| // SPDX-License-Identifier: GPL-2.0-only |
| /* Copyright (c) 2020 Facebook */ |
| |
| #include <linux/err.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/debugfs.h> |
| #include <linux/init.h> |
| #include <linux/pci.h> |
| #include <linux/serial_8250.h> |
| #include <linux/clkdev.h> |
| #include <linux/clk-provider.h> |
| #include <linux/platform_device.h> |
| #include <linux/ptp_clock_kernel.h> |
| #include <linux/spi/spi.h> |
| #include <linux/spi/xilinx_spi.h> |
| #include <net/devlink.h> |
| #include <linux/i2c.h> |
| #include <linux/mtd/mtd.h> |
| |
| #ifndef PCI_VENDOR_ID_FACEBOOK |
| #define PCI_VENDOR_ID_FACEBOOK 0x1d9b |
| #endif |
| |
| #ifndef PCI_DEVICE_ID_FACEBOOK_TIMECARD |
| #define PCI_DEVICE_ID_FACEBOOK_TIMECARD 0x0400 |
| #endif |
| |
| static struct class timecard_class = { |
| .owner = THIS_MODULE, |
| .name = "timecard", |
| }; |
| |
| struct ocp_reg { |
| u32 ctrl; |
| u32 status; |
| u32 select; |
| u32 version; |
| u32 time_ns; |
| u32 time_sec; |
| u32 __pad0[2]; |
| u32 adjust_ns; |
| u32 adjust_sec; |
| u32 __pad1[2]; |
| u32 offset_ns; |
| u32 offset_window_ns; |
| u32 __pad2[2]; |
| u32 drift_ns; |
| u32 drift_window_ns; |
| u32 __pad3[6]; |
| u32 servo_offset_p; |
| u32 servo_offset_i; |
| u32 servo_drift_p; |
| u32 servo_drift_i; |
| }; |
| |
| #define OCP_CTRL_ENABLE BIT(0) |
| #define OCP_CTRL_ADJUST_TIME BIT(1) |
| #define OCP_CTRL_ADJUST_OFFSET BIT(2) |
| #define OCP_CTRL_ADJUST_DRIFT BIT(3) |
| #define OCP_CTRL_ADJUST_SERVO BIT(8) |
| #define OCP_CTRL_READ_TIME_REQ BIT(30) |
| #define OCP_CTRL_READ_TIME_DONE BIT(31) |
| |
| #define OCP_STATUS_IN_SYNC BIT(0) |
| #define OCP_STATUS_IN_HOLDOVER BIT(1) |
| |
| #define OCP_SELECT_CLK_NONE 0 |
| #define OCP_SELECT_CLK_REG 0xfe |
| |
| struct tod_reg { |
| u32 ctrl; |
| u32 status; |
| u32 uart_polarity; |
| u32 version; |
| u32 adj_sec; |
| u32 __pad0[3]; |
| u32 uart_baud; |
| u32 __pad1[3]; |
| u32 utc_status; |
| u32 leap; |
| }; |
| |
| #define TOD_CTRL_PROTOCOL BIT(28) |
| #define TOD_CTRL_DISABLE_FMT_A BIT(17) |
| #define TOD_CTRL_DISABLE_FMT_B BIT(16) |
| #define TOD_CTRL_ENABLE BIT(0) |
| #define TOD_CTRL_GNSS_MASK ((1U << 4) - 1) |
| #define TOD_CTRL_GNSS_SHIFT 24 |
| |
| #define TOD_STATUS_UTC_MASK 0xff |
| #define TOD_STATUS_UTC_VALID BIT(8) |
| #define TOD_STATUS_LEAP_VALID BIT(16) |
| |
| struct ts_reg { |
| u32 enable; |
| u32 error; |
| u32 polarity; |
| u32 version; |
| u32 __pad0[4]; |
| u32 cable_delay; |
| u32 __pad1[3]; |
| u32 intr; |
| u32 intr_mask; |
| u32 event_count; |
| u32 __pad2[1]; |
| u32 ts_count; |
| u32 time_ns; |
| u32 time_sec; |
| u32 data_width; |
| u32 data; |
| }; |
| |
| struct pps_reg { |
| u32 ctrl; |
| u32 status; |
| u32 __pad0[6]; |
| u32 cable_delay; |
| }; |
| |
| #define PPS_STATUS_FILTER_ERR BIT(0) |
| #define PPS_STATUS_SUPERV_ERR BIT(1) |
| |
| struct img_reg { |
| u32 version; |
| }; |
| |
| struct gpio_reg { |
| u32 gpio1; |
| u32 __pad0; |
| u32 gpio2; |
| u32 __pad1; |
| }; |
| |
| struct irig_master_reg { |
| u32 ctrl; |
| u32 status; |
| u32 __pad0; |
| u32 version; |
| u32 adj_sec; |
| u32 mode_ctrl; |
| }; |
| |
| #define IRIG_M_CTRL_ENABLE BIT(0) |
| |
| struct irig_slave_reg { |
| u32 ctrl; |
| u32 status; |
| u32 __pad0; |
| u32 version; |
| u32 adj_sec; |
| u32 mode_ctrl; |
| }; |
| |
| #define IRIG_S_CTRL_ENABLE BIT(0) |
| |
| struct dcf_master_reg { |
| u32 ctrl; |
| u32 status; |
| u32 __pad0; |
| u32 version; |
| u32 adj_sec; |
| }; |
| |
| #define DCF_M_CTRL_ENABLE BIT(0) |
| |
| struct dcf_slave_reg { |
| u32 ctrl; |
| u32 status; |
| u32 __pad0; |
| u32 version; |
| u32 adj_sec; |
| }; |
| |
| #define DCF_S_CTRL_ENABLE BIT(0) |
| |
| struct ptp_ocp_flash_info { |
| const char *name; |
| int pci_offset; |
| int data_size; |
| void *data; |
| }; |
| |
| struct ptp_ocp_i2c_info { |
| const char *name; |
| unsigned long fixed_rate; |
| size_t data_size; |
| void *data; |
| }; |
| |
| struct ptp_ocp_ext_info { |
| int index; |
| irqreturn_t (*irq_fcn)(int irq, void *priv); |
| int (*enable)(void *priv, u32 req, bool enable); |
| }; |
| |
| struct ptp_ocp_ext_src { |
| void __iomem *mem; |
| struct ptp_ocp *bp; |
| struct ptp_ocp_ext_info *info; |
| int irq_vec; |
| }; |
| |
| struct ptp_ocp { |
| struct pci_dev *pdev; |
| struct device dev; |
| spinlock_t lock; |
| struct ocp_reg __iomem *reg; |
| struct tod_reg __iomem *tod; |
| struct pps_reg __iomem *pps_to_ext; |
| struct pps_reg __iomem *pps_to_clk; |
| struct gpio_reg __iomem *pps_select; |
| struct gpio_reg __iomem *sma; |
| struct irig_master_reg __iomem *irig_out; |
| struct irig_slave_reg __iomem *irig_in; |
| struct dcf_master_reg __iomem *dcf_out; |
| struct dcf_slave_reg __iomem *dcf_in; |
| struct tod_reg __iomem *nmea_out; |
| struct ptp_ocp_ext_src *pps; |
| struct ptp_ocp_ext_src *ts0; |
| struct ptp_ocp_ext_src *ts1; |
| struct ptp_ocp_ext_src *ts2; |
| struct img_reg __iomem *image; |
| struct ptp_clock *ptp; |
| struct ptp_clock_info ptp_info; |
| struct platform_device *i2c_ctrl; |
| struct platform_device *spi_flash; |
| struct clk_hw *i2c_clk; |
| struct timer_list watchdog; |
| struct dentry *debug_root; |
| time64_t gnss_lost; |
| int id; |
| int n_irqs; |
| int gnss_port; |
| int gnss2_port; |
| int mac_port; /* miniature atomic clock */ |
| int nmea_port; |
| u8 serial[6]; |
| bool has_serial; |
| u32 pps_req_map; |
| int flash_start; |
| u32 utc_tai_offset; |
| u32 ts_window_adjust; |
| }; |
| |
| #define OCP_REQ_TIMESTAMP BIT(0) |
| #define OCP_REQ_PPS BIT(1) |
| |
| struct ocp_resource { |
| unsigned long offset; |
| int size; |
| int irq_vec; |
| int (*setup)(struct ptp_ocp *bp, struct ocp_resource *r); |
| void *extra; |
| unsigned long bp_offset; |
| const char * const name; |
| }; |
| |
| static int ptp_ocp_register_mem(struct ptp_ocp *bp, struct ocp_resource *r); |
| static int ptp_ocp_register_i2c(struct ptp_ocp *bp, struct ocp_resource *r); |
| static int ptp_ocp_register_spi(struct ptp_ocp *bp, struct ocp_resource *r); |
| static int ptp_ocp_register_serial(struct ptp_ocp *bp, struct ocp_resource *r); |
| static int ptp_ocp_register_ext(struct ptp_ocp *bp, struct ocp_resource *r); |
| static int ptp_ocp_fb_board_init(struct ptp_ocp *bp, struct ocp_resource *r); |
| static irqreturn_t ptp_ocp_ts_irq(int irq, void *priv); |
| static int ptp_ocp_ts_enable(void *priv, u32 req, bool enable); |
| |
| #define bp_assign_entry(bp, res, val) ({ \ |
| uintptr_t addr = (uintptr_t)(bp) + (res)->bp_offset; \ |
| *(typeof(val) *)addr = val; \ |
| }) |
| |
| #define OCP_RES_LOCATION(member) \ |
| .name = #member, .bp_offset = offsetof(struct ptp_ocp, member) |
| |
| #define OCP_MEM_RESOURCE(member) \ |
| OCP_RES_LOCATION(member), .setup = ptp_ocp_register_mem |
| |
| #define OCP_SERIAL_RESOURCE(member) \ |
| OCP_RES_LOCATION(member), .setup = ptp_ocp_register_serial |
| |
| #define OCP_I2C_RESOURCE(member) \ |
| OCP_RES_LOCATION(member), .setup = ptp_ocp_register_i2c |
| |
| #define OCP_SPI_RESOURCE(member) \ |
| OCP_RES_LOCATION(member), .setup = ptp_ocp_register_spi |
| |
| #define OCP_EXT_RESOURCE(member) \ |
| OCP_RES_LOCATION(member), .setup = ptp_ocp_register_ext |
| |
| /* This is the MSI vector mapping used. |
| * 0: TS3 (and PPS) |
| * 1: TS0 |
| * 2: TS1 |
| * 3: GNSS |
| * 4: GNSS2 |
| * 5: MAC |
| * 6: TS2 |
| * 7: I2C controller |
| * 8: HWICAP (notused) |
| * 9: SPI Flash |
| * 10: NMEA |
| */ |
| |
| static struct ocp_resource ocp_fb_resource[] = { |
| { |
| OCP_MEM_RESOURCE(reg), |
| .offset = 0x01000000, .size = 0x10000, |
| }, |
| { |
| OCP_EXT_RESOURCE(ts0), |
| .offset = 0x01010000, .size = 0x10000, .irq_vec = 1, |
| .extra = &(struct ptp_ocp_ext_info) { |
| .index = 0, |
| .irq_fcn = ptp_ocp_ts_irq, |
| .enable = ptp_ocp_ts_enable, |
| }, |
| }, |
| { |
| OCP_EXT_RESOURCE(ts1), |
| .offset = 0x01020000, .size = 0x10000, .irq_vec = 2, |
| .extra = &(struct ptp_ocp_ext_info) { |
| .index = 1, |
| .irq_fcn = ptp_ocp_ts_irq, |
| .enable = ptp_ocp_ts_enable, |
| }, |
| }, |
| { |
| OCP_EXT_RESOURCE(ts2), |
| .offset = 0x01060000, .size = 0x10000, .irq_vec = 6, |
| .extra = &(struct ptp_ocp_ext_info) { |
| .index = 2, |
| .irq_fcn = ptp_ocp_ts_irq, |
| .enable = ptp_ocp_ts_enable, |
| }, |
| }, |
| { |
| OCP_EXT_RESOURCE(pps), |
| .offset = 0x010C0000, .size = 0x10000, .irq_vec = 0, |
| .extra = &(struct ptp_ocp_ext_info) { |
| .index = 3, |
| .irq_fcn = ptp_ocp_ts_irq, |
| .enable = ptp_ocp_ts_enable, |
| }, |
| }, |
| { |
| OCP_MEM_RESOURCE(pps_to_ext), |
| .offset = 0x01030000, .size = 0x10000, |
| }, |
| { |
| OCP_MEM_RESOURCE(pps_to_clk), |
| .offset = 0x01040000, .size = 0x10000, |
| }, |
| { |
| OCP_MEM_RESOURCE(tod), |
| .offset = 0x01050000, .size = 0x10000, |
| }, |
| { |
| OCP_MEM_RESOURCE(irig_in), |
| .offset = 0x01070000, .size = 0x10000, |
| }, |
| { |
| OCP_MEM_RESOURCE(irig_out), |
| .offset = 0x01080000, .size = 0x10000, |
| }, |
| { |
| OCP_MEM_RESOURCE(dcf_in), |
| .offset = 0x01090000, .size = 0x10000, |
| }, |
| { |
| OCP_MEM_RESOURCE(dcf_out), |
| .offset = 0x010A0000, .size = 0x10000, |
| }, |
| { |
| OCP_MEM_RESOURCE(nmea_out), |
| .offset = 0x010B0000, .size = 0x10000, |
| }, |
| { |
| OCP_MEM_RESOURCE(image), |
| .offset = 0x00020000, .size = 0x1000, |
| }, |
| { |
| OCP_MEM_RESOURCE(pps_select), |
| .offset = 0x00130000, .size = 0x1000, |
| }, |
| { |
| OCP_MEM_RESOURCE(sma), |
| .offset = 0x00140000, .size = 0x1000, |
| }, |
| { |
| OCP_I2C_RESOURCE(i2c_ctrl), |
| .offset = 0x00150000, .size = 0x10000, .irq_vec = 7, |
| .extra = &(struct ptp_ocp_i2c_info) { |
| .name = "xiic-i2c", |
| .fixed_rate = 50000000, |
| }, |
| }, |
| { |
| OCP_SERIAL_RESOURCE(gnss_port), |
| .offset = 0x00160000 + 0x1000, .irq_vec = 3, |
| }, |
| { |
| OCP_SERIAL_RESOURCE(gnss2_port), |
| .offset = 0x00170000 + 0x1000, .irq_vec = 4, |
| }, |
| { |
| OCP_SERIAL_RESOURCE(mac_port), |
| .offset = 0x00180000 + 0x1000, .irq_vec = 5, |
| }, |
| { |
| OCP_SERIAL_RESOURCE(nmea_port), |
| .offset = 0x00190000 + 0x1000, .irq_vec = 10, |
| }, |
| { |
| OCP_SPI_RESOURCE(spi_flash), |
| .offset = 0x00310000, .size = 0x10000, .irq_vec = 9, |
| .extra = &(struct ptp_ocp_flash_info) { |
| .name = "xilinx_spi", .pci_offset = 0, |
| .data_size = sizeof(struct xspi_platform_data), |
| .data = &(struct xspi_platform_data) { |
| .num_chipselect = 1, |
| .bits_per_word = 8, |
| .num_devices = 1, |
| .devices = &(struct spi_board_info) { |
| .modalias = "spi-nor", |
| }, |
| }, |
| }, |
| }, |
| { |
| .setup = ptp_ocp_fb_board_init, |
| }, |
| { } |
| }; |
| |
| static const struct pci_device_id ptp_ocp_pcidev_id[] = { |
| { PCI_DEVICE_DATA(FACEBOOK, TIMECARD, &ocp_fb_resource) }, |
| { 0 } |
| }; |
| MODULE_DEVICE_TABLE(pci, ptp_ocp_pcidev_id); |
| |
| static DEFINE_MUTEX(ptp_ocp_lock); |
| static DEFINE_IDR(ptp_ocp_idr); |
| |
| struct ocp_selector { |
| const char *name; |
| int value; |
| }; |
| |
| static struct ocp_selector ptp_ocp_clock[] = { |
| { .name = "NONE", .value = 0 }, |
| { .name = "TOD", .value = 1 }, |
| { .name = "IRIG", .value = 2 }, |
| { .name = "PPS", .value = 3 }, |
| { .name = "PTP", .value = 4 }, |
| { .name = "RTC", .value = 5 }, |
| { .name = "DCF", .value = 6 }, |
| { .name = "REGS", .value = 0xfe }, |
| { .name = "EXT", .value = 0xff }, |
| { } |
| }; |
| |
| static struct ocp_selector ptp_ocp_sma_in[] = { |
| { .name = "10Mhz", .value = 0x00 }, |
| { .name = "PPS1", .value = 0x01 }, |
| { .name = "PPS2", .value = 0x02 }, |
| { .name = "TS1", .value = 0x04 }, |
| { .name = "TS2", .value = 0x08 }, |
| { .name = "IRIG", .value = 0x10 }, |
| { .name = "DCF", .value = 0x20 }, |
| { } |
| }; |
| |
| static struct ocp_selector ptp_ocp_sma_out[] = { |
| { .name = "10Mhz", .value = 0x00 }, |
| { .name = "PHC", .value = 0x01 }, |
| { .name = "MAC", .value = 0x02 }, |
| { .name = "GNSS", .value = 0x04 }, |
| { .name = "GNSS2", .value = 0x08 }, |
| { .name = "IRIG", .value = 0x10 }, |
| { .name = "DCF", .value = 0x20 }, |
| { } |
| }; |
| |
| static const char * |
| ptp_ocp_select_name_from_val(struct ocp_selector *tbl, int val) |
| { |
| int i; |
| |
| for (i = 0; tbl[i].name; i++) |
| if (tbl[i].value == val) |
| return tbl[i].name; |
| return NULL; |
| } |
| |
| static int |
| ptp_ocp_select_val_from_name(struct ocp_selector *tbl, const char *name) |
| { |
| const char *select; |
| int i; |
| |
| for (i = 0; tbl[i].name; i++) { |
| select = tbl[i].name; |
| if (!strncasecmp(name, select, strlen(select))) |
| return tbl[i].value; |
| } |
| return -EINVAL; |
| } |
| |
| static ssize_t |
| ptp_ocp_select_table_show(struct ocp_selector *tbl, char *buf) |
| { |
| ssize_t count; |
| int i; |
| |
| count = 0; |
| for (i = 0; tbl[i].name; i++) |
| count += sysfs_emit_at(buf, count, "%s ", tbl[i].name); |
| if (count) |
| count--; |
| count += sysfs_emit_at(buf, count, "\n"); |
| return count; |
| } |
| |
| static int |
| __ptp_ocp_gettime_locked(struct ptp_ocp *bp, struct timespec64 *ts, |
| struct ptp_system_timestamp *sts) |
| { |
| u32 ctrl, time_sec, time_ns; |
| int i; |
| |
| ptp_read_system_prets(sts); |
| |
| ctrl = OCP_CTRL_READ_TIME_REQ | OCP_CTRL_ENABLE; |
| iowrite32(ctrl, &bp->reg->ctrl); |
| |
| for (i = 0; i < 100; i++) { |
| ctrl = ioread32(&bp->reg->ctrl); |
| if (ctrl & OCP_CTRL_READ_TIME_DONE) |
| break; |
| } |
| ptp_read_system_postts(sts); |
| |
| if (sts && bp->ts_window_adjust) { |
| s64 ns = timespec64_to_ns(&sts->post_ts); |
| |
| sts->post_ts = ns_to_timespec64(ns - bp->ts_window_adjust); |
| } |
| |
| time_ns = ioread32(&bp->reg->time_ns); |
| time_sec = ioread32(&bp->reg->time_sec); |
| |
| ts->tv_sec = time_sec; |
| ts->tv_nsec = time_ns; |
| |
| return ctrl & OCP_CTRL_READ_TIME_DONE ? 0 : -ETIMEDOUT; |
| } |
| |
| static int |
| ptp_ocp_gettimex(struct ptp_clock_info *ptp_info, struct timespec64 *ts, |
| struct ptp_system_timestamp *sts) |
| { |
| struct ptp_ocp *bp = container_of(ptp_info, struct ptp_ocp, ptp_info); |
| unsigned long flags; |
| int err; |
| |
| spin_lock_irqsave(&bp->lock, flags); |
| err = __ptp_ocp_gettime_locked(bp, ts, sts); |
| spin_unlock_irqrestore(&bp->lock, flags); |
| |
| return err; |
| } |
| |
| static void |
| __ptp_ocp_settime_locked(struct ptp_ocp *bp, const struct timespec64 *ts) |
| { |
| u32 ctrl, time_sec, time_ns; |
| u32 select; |
| |
| time_ns = ts->tv_nsec; |
| time_sec = ts->tv_sec; |
| |
| select = ioread32(&bp->reg->select); |
| iowrite32(OCP_SELECT_CLK_REG, &bp->reg->select); |
| |
| iowrite32(time_ns, &bp->reg->adjust_ns); |
| iowrite32(time_sec, &bp->reg->adjust_sec); |
| |
| ctrl = OCP_CTRL_ADJUST_TIME | OCP_CTRL_ENABLE; |
| iowrite32(ctrl, &bp->reg->ctrl); |
| |
| /* restore clock selection */ |
| iowrite32(select >> 16, &bp->reg->select); |
| } |
| |
| static int |
| ptp_ocp_settime(struct ptp_clock_info *ptp_info, const struct timespec64 *ts) |
| { |
| struct ptp_ocp *bp = container_of(ptp_info, struct ptp_ocp, ptp_info); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&bp->lock, flags); |
| __ptp_ocp_settime_locked(bp, ts); |
| spin_unlock_irqrestore(&bp->lock, flags); |
| |
| return 0; |
| } |
| |
| static void |
| __ptp_ocp_adjtime_locked(struct ptp_ocp *bp, u64 adj_val) |
| { |
| u32 select, ctrl; |
| |
| select = ioread32(&bp->reg->select); |
| iowrite32(OCP_SELECT_CLK_REG, &bp->reg->select); |
| |
| iowrite32(adj_val, &bp->reg->offset_ns); |
| iowrite32(adj_val & 0x7f, &bp->reg->offset_window_ns); |
| |
| ctrl = OCP_CTRL_ADJUST_OFFSET | OCP_CTRL_ENABLE; |
| iowrite32(ctrl, &bp->reg->ctrl); |
| |
| /* restore clock selection */ |
| iowrite32(select >> 16, &bp->reg->select); |
| } |
| |
| static int |
| ptp_ocp_adjtime(struct ptp_clock_info *ptp_info, s64 delta_ns) |
| { |
| struct ptp_ocp *bp = container_of(ptp_info, struct ptp_ocp, ptp_info); |
| unsigned long flags; |
| u32 adj_ns, sign; |
| |
| sign = delta_ns < 0 ? BIT(31) : 0; |
| adj_ns = sign ? -delta_ns : delta_ns; |
| |
| spin_lock_irqsave(&bp->lock, flags); |
| __ptp_ocp_adjtime_locked(bp, sign | adj_ns); |
| spin_unlock_irqrestore(&bp->lock, flags); |
| |
| return 0; |
| } |
| |
| static int |
| ptp_ocp_null_adjfine(struct ptp_clock_info *ptp_info, long scaled_ppm) |
| { |
| if (scaled_ppm == 0) |
| return 0; |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static int |
| ptp_ocp_null_adjphase(struct ptp_clock_info *ptp_info, s32 phase_ns) |
| { |
| return -EOPNOTSUPP; |
| } |
| |
| static int |
| ptp_ocp_enable(struct ptp_clock_info *ptp_info, struct ptp_clock_request *rq, |
| int on) |
| { |
| struct ptp_ocp *bp = container_of(ptp_info, struct ptp_ocp, ptp_info); |
| struct ptp_ocp_ext_src *ext = NULL; |
| u32 req; |
| int err; |
| |
| switch (rq->type) { |
| case PTP_CLK_REQ_EXTTS: |
| req = OCP_REQ_TIMESTAMP; |
| switch (rq->extts.index) { |
| case 0: |
| ext = bp->ts0; |
| break; |
| case 1: |
| ext = bp->ts1; |
| break; |
| case 2: |
| ext = bp->ts2; |
| break; |
| case 3: |
| ext = bp->pps; |
| break; |
| } |
| break; |
| case PTP_CLK_REQ_PPS: |
| req = OCP_REQ_PPS; |
| ext = bp->pps; |
| break; |
| case PTP_CLK_REQ_PEROUT: |
| if (on && |
| (rq->perout.period.sec != 1 || rq->perout.period.nsec != 0)) |
| return -EINVAL; |
| /* This is a request for 1PPS on an output SMA. |
| * Allow, but assume manual configuration. |
| */ |
| return 0; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| err = -ENXIO; |
| if (ext) |
| err = ext->info->enable(ext, req, on); |
| |
| return err; |
| } |
| |
| static const struct ptp_clock_info ptp_ocp_clock_info = { |
| .owner = THIS_MODULE, |
| .name = KBUILD_MODNAME, |
| .max_adj = 100000000, |
| .gettimex64 = ptp_ocp_gettimex, |
| .settime64 = ptp_ocp_settime, |
| .adjtime = ptp_ocp_adjtime, |
| .adjfine = ptp_ocp_null_adjfine, |
| .adjphase = ptp_ocp_null_adjphase, |
| .enable = ptp_ocp_enable, |
| .pps = true, |
| .n_ext_ts = 4, |
| .n_per_out = 1, |
| }; |
| |
| static void |
| __ptp_ocp_clear_drift_locked(struct ptp_ocp *bp) |
| { |
| u32 ctrl, select; |
| |
| select = ioread32(&bp->reg->select); |
| iowrite32(OCP_SELECT_CLK_REG, &bp->reg->select); |
| |
| iowrite32(0, &bp->reg->drift_ns); |
| |
| ctrl = OCP_CTRL_ADJUST_DRIFT | OCP_CTRL_ENABLE; |
| iowrite32(ctrl, &bp->reg->ctrl); |
| |
| /* restore clock selection */ |
| iowrite32(select >> 16, &bp->reg->select); |
| } |
| |
| static void |
| ptp_ocp_watchdog(struct timer_list *t) |
| { |
| struct ptp_ocp *bp = from_timer(bp, t, watchdog); |
| unsigned long flags; |
| u32 status; |
| |
| status = ioread32(&bp->pps_to_clk->status); |
| |
| if (status & PPS_STATUS_SUPERV_ERR) { |
| iowrite32(status, &bp->pps_to_clk->status); |
| if (!bp->gnss_lost) { |
| spin_lock_irqsave(&bp->lock, flags); |
| __ptp_ocp_clear_drift_locked(bp); |
| spin_unlock_irqrestore(&bp->lock, flags); |
| bp->gnss_lost = ktime_get_real_seconds(); |
| } |
| |
| } else if (bp->gnss_lost) { |
| bp->gnss_lost = 0; |
| } |
| |
| mod_timer(&bp->watchdog, jiffies + HZ); |
| } |
| |
| static void |
| ptp_ocp_estimate_pci_timing(struct ptp_ocp *bp) |
| { |
| ktime_t start, end; |
| ktime_t delay; |
| u32 ctrl; |
| |
| ctrl = ioread32(&bp->reg->ctrl); |
| ctrl = OCP_CTRL_READ_TIME_REQ | OCP_CTRL_ENABLE; |
| |
| iowrite32(ctrl, &bp->reg->ctrl); |
| |
| start = ktime_get_ns(); |
| |
| ctrl = ioread32(&bp->reg->ctrl); |
| |
| end = ktime_get_ns(); |
| |
| delay = end - start; |
| bp->ts_window_adjust = (delay >> 5) * 3; |
| } |
| |
| static int |
| ptp_ocp_init_clock(struct ptp_ocp *bp) |
| { |
| struct timespec64 ts; |
| bool sync; |
| u32 ctrl; |
| |
| ctrl = OCP_CTRL_ENABLE; |
| iowrite32(ctrl, &bp->reg->ctrl); |
| |
| /* NO DRIFT Correction */ |
| /* offset_p:i 1/8, offset_i: 1/16, drift_p: 0, drift_i: 0 */ |
| iowrite32(0x2000, &bp->reg->servo_offset_p); |
| iowrite32(0x1000, &bp->reg->servo_offset_i); |
| iowrite32(0, &bp->reg->servo_drift_p); |
| iowrite32(0, &bp->reg->servo_drift_i); |
| |
| /* latch servo values */ |
| ctrl |= OCP_CTRL_ADJUST_SERVO; |
| iowrite32(ctrl, &bp->reg->ctrl); |
| |
| if ((ioread32(&bp->reg->ctrl) & OCP_CTRL_ENABLE) == 0) { |
| dev_err(&bp->pdev->dev, "clock not enabled\n"); |
| return -ENODEV; |
| } |
| |
| ptp_ocp_estimate_pci_timing(bp); |
| |
| sync = ioread32(&bp->reg->status) & OCP_STATUS_IN_SYNC; |
| if (!sync) { |
| ktime_get_clocktai_ts64(&ts); |
| ptp_ocp_settime(&bp->ptp_info, &ts); |
| } |
| |
| /* If there is a clock supervisor, then enable the watchdog */ |
| if (bp->pps_to_clk) { |
| timer_setup(&bp->watchdog, ptp_ocp_watchdog, 0); |
| mod_timer(&bp->watchdog, jiffies + HZ); |
| } |
| |
| return 0; |
| } |
| |
| static void |
| ptp_ocp_utc_distribute(struct ptp_ocp *bp, u32 val) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&bp->lock, flags); |
| |
| bp->utc_tai_offset = val; |
| |
| if (bp->irig_out) |
| iowrite32(val, &bp->irig_out->adj_sec); |
| if (bp->dcf_out) |
| iowrite32(val, &bp->dcf_out->adj_sec); |
| if (bp->nmea_out) |
| iowrite32(val, &bp->nmea_out->adj_sec); |
| |
| spin_unlock_irqrestore(&bp->lock, flags); |
| } |
| |
| static void |
| ptp_ocp_tod_init(struct ptp_ocp *bp) |
| { |
| u32 ctrl, reg; |
| |
| ctrl = ioread32(&bp->tod->ctrl); |
| ctrl |= TOD_CTRL_PROTOCOL | TOD_CTRL_ENABLE; |
| ctrl &= ~(TOD_CTRL_DISABLE_FMT_A | TOD_CTRL_DISABLE_FMT_B); |
| iowrite32(ctrl, &bp->tod->ctrl); |
| |
| reg = ioread32(&bp->tod->utc_status); |
| if (reg & TOD_STATUS_UTC_VALID) |
| ptp_ocp_utc_distribute(bp, reg & TOD_STATUS_UTC_MASK); |
| } |
| |
| static void |
| ptp_ocp_tod_info(struct ptp_ocp *bp) |
| { |
| static const char * const proto_name[] = { |
| "NMEA", "NMEA_ZDA", "NMEA_RMC", "NMEA_none", |
| "UBX", "UBX_UTC", "UBX_LS", "UBX_none" |
| }; |
| static const char * const gnss_name[] = { |
| "ALL", "COMBINED", "GPS", "GLONASS", "GALILEO", "BEIDOU", |
| }; |
| u32 version, ctrl, reg; |
| int idx; |
| |
| version = ioread32(&bp->tod->version); |
| dev_info(&bp->pdev->dev, "TOD Version %d.%d.%d\n", |
| version >> 24, (version >> 16) & 0xff, version & 0xffff); |
| |
| ctrl = ioread32(&bp->tod->ctrl); |
| idx = ctrl & TOD_CTRL_PROTOCOL ? 4 : 0; |
| idx += (ctrl >> 16) & 3; |
| dev_info(&bp->pdev->dev, "control: %x\n", ctrl); |
| dev_info(&bp->pdev->dev, "TOD Protocol %s %s\n", proto_name[idx], |
| ctrl & TOD_CTRL_ENABLE ? "enabled" : ""); |
| |
| idx = (ctrl >> TOD_CTRL_GNSS_SHIFT) & TOD_CTRL_GNSS_MASK; |
| if (idx < ARRAY_SIZE(gnss_name)) |
| dev_info(&bp->pdev->dev, "GNSS %s\n", gnss_name[idx]); |
| |
| reg = ioread32(&bp->tod->status); |
| dev_info(&bp->pdev->dev, "status: %x\n", reg); |
| |
| reg = ioread32(&bp->tod->adj_sec); |
| dev_info(&bp->pdev->dev, "correction: %d\n", reg); |
| |
| reg = ioread32(&bp->tod->utc_status); |
| dev_info(&bp->pdev->dev, "utc_status: %x\n", reg); |
| dev_info(&bp->pdev->dev, "utc_offset: %d valid:%d leap_valid:%d\n", |
| reg & TOD_STATUS_UTC_MASK, reg & TOD_STATUS_UTC_VALID ? 1 : 0, |
| reg & TOD_STATUS_LEAP_VALID ? 1 : 0); |
| } |
| |
| static int |
| ptp_ocp_firstchild(struct device *dev, void *data) |
| { |
| return 1; |
| } |
| |
| static int |
| ptp_ocp_read_i2c(struct i2c_adapter *adap, u8 addr, u8 reg, u8 sz, u8 *data) |
| { |
| struct i2c_msg msgs[2] = { |
| { |
| .addr = addr, |
| .len = 1, |
| .buf = ®, |
| }, |
| { |
| .addr = addr, |
| .flags = I2C_M_RD, |
| .len = 2, |
| .buf = data, |
| }, |
| }; |
| int err; |
| u8 len; |
| |
| /* xiic-i2c for some stupid reason only does 2 byte reads. */ |
| while (sz) { |
| len = min_t(u8, sz, 2); |
| msgs[1].len = len; |
| err = i2c_transfer(adap, msgs, 2); |
| if (err != msgs[1].len) |
| return err; |
| msgs[1].buf += len; |
| reg += len; |
| sz -= len; |
| } |
| return 0; |
| } |
| |
| static void |
| ptp_ocp_get_serial_number(struct ptp_ocp *bp) |
| { |
| struct i2c_adapter *adap; |
| struct device *dev; |
| int err; |
| |
| if (!bp->i2c_ctrl) |
| return; |
| |
| dev = device_find_child(&bp->i2c_ctrl->dev, NULL, ptp_ocp_firstchild); |
| if (!dev) { |
| dev_err(&bp->pdev->dev, "Can't find I2C adapter\n"); |
| return; |
| } |
| |
| adap = i2c_verify_adapter(dev); |
| if (!adap) { |
| dev_err(&bp->pdev->dev, "device '%s' isn't an I2C adapter\n", |
| dev_name(dev)); |
| goto out; |
| } |
| |
| err = ptp_ocp_read_i2c(adap, 0x58, 0x9A, 6, bp->serial); |
| if (err) { |
| dev_err(&bp->pdev->dev, "could not read eeprom: %d\n", err); |
| goto out; |
| } |
| |
| bp->has_serial = true; |
| |
| out: |
| put_device(dev); |
| } |
| |
| static struct device * |
| ptp_ocp_find_flash(struct ptp_ocp *bp) |
| { |
| struct device *dev, *last; |
| |
| last = NULL; |
| dev = &bp->spi_flash->dev; |
| |
| while ((dev = device_find_child(dev, NULL, ptp_ocp_firstchild))) { |
| if (!strcmp("mtd", dev_bus_name(dev))) |
| break; |
| put_device(last); |
| last = dev; |
| } |
| put_device(last); |
| |
| return dev; |
| } |
| |
| static int |
| ptp_ocp_devlink_flash(struct devlink *devlink, struct device *dev, |
| const struct firmware *fw) |
| { |
| struct mtd_info *mtd = dev_get_drvdata(dev); |
| struct ptp_ocp *bp = devlink_priv(devlink); |
| size_t off, len, resid, wrote; |
| struct erase_info erase; |
| size_t base, blksz; |
| int err = 0; |
| |
| off = 0; |
| base = bp->flash_start; |
| blksz = 4096; |
| resid = fw->size; |
| |
| while (resid) { |
| devlink_flash_update_status_notify(devlink, "Flashing", |
| NULL, off, fw->size); |
| |
| len = min_t(size_t, resid, blksz); |
| erase.addr = base + off; |
| erase.len = blksz; |
| |
| err = mtd_erase(mtd, &erase); |
| if (err) |
| goto out; |
| |
| err = mtd_write(mtd, base + off, len, &wrote, &fw->data[off]); |
| if (err) |
| goto out; |
| |
| off += blksz; |
| resid -= len; |
| } |
| out: |
| return err; |
| } |
| |
| static int |
| ptp_ocp_devlink_flash_update(struct devlink *devlink, |
| struct devlink_flash_update_params *params, |
| struct netlink_ext_ack *extack) |
| { |
| struct ptp_ocp *bp = devlink_priv(devlink); |
| struct device *dev; |
| const char *msg; |
| int err; |
| |
| dev = ptp_ocp_find_flash(bp); |
| if (!dev) { |
| dev_err(&bp->pdev->dev, "Can't find Flash SPI adapter\n"); |
| return -ENODEV; |
| } |
| |
| devlink_flash_update_status_notify(devlink, "Preparing to flash", |
| NULL, 0, 0); |
| |
| err = ptp_ocp_devlink_flash(devlink, dev, params->fw); |
| |
| msg = err ? "Flash error" : "Flash complete"; |
| devlink_flash_update_status_notify(devlink, msg, NULL, 0, 0); |
| |
| put_device(dev); |
| return err; |
| } |
| |
| static int |
| ptp_ocp_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req, |
| struct netlink_ext_ack *extack) |
| { |
| struct ptp_ocp *bp = devlink_priv(devlink); |
| char buf[32]; |
| int err; |
| |
| err = devlink_info_driver_name_put(req, KBUILD_MODNAME); |
| if (err) |
| return err; |
| |
| if (bp->image) { |
| u32 ver = ioread32(&bp->image->version); |
| |
| if (ver & 0xffff) { |
| sprintf(buf, "%d", ver); |
| err = devlink_info_version_running_put(req, |
| "fw", |
| buf); |
| } else { |
| sprintf(buf, "%d", ver >> 16); |
| err = devlink_info_version_running_put(req, |
| "loader", |
| buf); |
| } |
| if (err) |
| return err; |
| } |
| |
| if (!bp->has_serial) |
| ptp_ocp_get_serial_number(bp); |
| |
| if (bp->has_serial) { |
| sprintf(buf, "%pM", bp->serial); |
| err = devlink_info_serial_number_put(req, buf); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static const struct devlink_ops ptp_ocp_devlink_ops = { |
| .flash_update = ptp_ocp_devlink_flash_update, |
| .info_get = ptp_ocp_devlink_info_get, |
| }; |
| |
| static void __iomem * |
| __ptp_ocp_get_mem(struct ptp_ocp *bp, unsigned long start, int size) |
| { |
| struct resource res = DEFINE_RES_MEM_NAMED(start, size, "ptp_ocp"); |
| |
| return devm_ioremap_resource(&bp->pdev->dev, &res); |
| } |
| |
| static void __iomem * |
| ptp_ocp_get_mem(struct ptp_ocp *bp, struct ocp_resource *r) |
| { |
| unsigned long start; |
| |
| start = pci_resource_start(bp->pdev, 0) + r->offset; |
| return __ptp_ocp_get_mem(bp, start, r->size); |
| } |
| |
| static void |
| ptp_ocp_set_irq_resource(struct resource *res, int irq) |
| { |
| struct resource r = DEFINE_RES_IRQ(irq); |
| *res = r; |
| } |
| |
| static void |
| ptp_ocp_set_mem_resource(struct resource *res, unsigned long start, int size) |
| { |
| struct resource r = DEFINE_RES_MEM(start, size); |
| *res = r; |
| } |
| |
| static int |
| ptp_ocp_register_spi(struct ptp_ocp *bp, struct ocp_resource *r) |
| { |
| struct ptp_ocp_flash_info *info; |
| struct pci_dev *pdev = bp->pdev; |
| struct platform_device *p; |
| struct resource res[2]; |
| unsigned long start; |
| int id; |
| |
| start = pci_resource_start(pdev, 0) + r->offset; |
| ptp_ocp_set_mem_resource(&res[0], start, r->size); |
| ptp_ocp_set_irq_resource(&res[1], pci_irq_vector(pdev, r->irq_vec)); |
| |
| info = r->extra; |
| id = pci_dev_id(pdev) << 1; |
| id += info->pci_offset; |
| |
| p = platform_device_register_resndata(&pdev->dev, info->name, id, |
| res, 2, info->data, |
| info->data_size); |
| if (IS_ERR(p)) |
| return PTR_ERR(p); |
| |
| bp_assign_entry(bp, r, p); |
| |
| return 0; |
| } |
| |
| static struct platform_device * |
| ptp_ocp_i2c_bus(struct pci_dev *pdev, struct ocp_resource *r, int id) |
| { |
| struct ptp_ocp_i2c_info *info; |
| struct resource res[2]; |
| unsigned long start; |
| |
| info = r->extra; |
| start = pci_resource_start(pdev, 0) + r->offset; |
| ptp_ocp_set_mem_resource(&res[0], start, r->size); |
| ptp_ocp_set_irq_resource(&res[1], pci_irq_vector(pdev, r->irq_vec)); |
| |
| return platform_device_register_resndata(&pdev->dev, info->name, |
| id, res, 2, |
| info->data, info->data_size); |
| } |
| |
| static int |
| ptp_ocp_register_i2c(struct ptp_ocp *bp, struct ocp_resource *r) |
| { |
| struct pci_dev *pdev = bp->pdev; |
| struct ptp_ocp_i2c_info *info; |
| struct platform_device *p; |
| struct clk_hw *clk; |
| char buf[32]; |
| int id; |
| |
| info = r->extra; |
| id = pci_dev_id(bp->pdev); |
| |
| sprintf(buf, "AXI.%d", id); |
| clk = clk_hw_register_fixed_rate(&pdev->dev, buf, NULL, 0, |
| info->fixed_rate); |
| if (IS_ERR(clk)) |
| return PTR_ERR(clk); |
| bp->i2c_clk = clk; |
| |
| sprintf(buf, "%s.%d", info->name, id); |
| devm_clk_hw_register_clkdev(&pdev->dev, clk, NULL, buf); |
| p = ptp_ocp_i2c_bus(bp->pdev, r, id); |
| if (IS_ERR(p)) |
| return PTR_ERR(p); |
| |
| bp_assign_entry(bp, r, p); |
| |
| return 0; |
| } |
| |
| static irqreturn_t |
| ptp_ocp_ts_irq(int irq, void *priv) |
| { |
| struct ptp_ocp_ext_src *ext = priv; |
| struct ts_reg __iomem *reg = ext->mem; |
| struct ptp_clock_event ev; |
| u32 sec, nsec; |
| |
| if (ext == ext->bp->pps) { |
| if (ext->bp->pps_req_map & OCP_REQ_PPS) { |
| ev.type = PTP_CLOCK_PPS; |
| ptp_clock_event(ext->bp->ptp, &ev); |
| } |
| |
| if ((ext->bp->pps_req_map & ~OCP_REQ_PPS) == 0) |
| goto out; |
| } |
| |
| /* XXX should fix API - this converts s/ns -> ts -> s/ns */ |
| sec = ioread32(®->time_sec); |
| nsec = ioread32(®->time_ns); |
| |
| ev.type = PTP_CLOCK_EXTTS; |
| ev.index = ext->info->index; |
| ev.timestamp = sec * NSEC_PER_SEC + nsec; |
| |
| ptp_clock_event(ext->bp->ptp, &ev); |
| |
| out: |
| iowrite32(1, ®->intr); /* write 1 to ack */ |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int |
| ptp_ocp_ts_enable(void *priv, u32 req, bool enable) |
| { |
| struct ptp_ocp_ext_src *ext = priv; |
| struct ts_reg __iomem *reg = ext->mem; |
| struct ptp_ocp *bp = ext->bp; |
| |
| if (ext == bp->pps) { |
| u32 old_map = bp->pps_req_map; |
| |
| if (enable) |
| bp->pps_req_map |= req; |
| else |
| bp->pps_req_map &= ~req; |
| |
| /* if no state change, just return */ |
| if ((!!old_map ^ !!bp->pps_req_map) == 0) |
| return 0; |
| } |
| |
| if (enable) { |
| iowrite32(1, ®->enable); |
| iowrite32(1, ®->intr_mask); |
| iowrite32(1, ®->intr); |
| } else { |
| iowrite32(0, ®->intr_mask); |
| iowrite32(0, ®->enable); |
| } |
| |
| return 0; |
| } |
| |
| static void |
| ptp_ocp_unregister_ext(struct ptp_ocp_ext_src *ext) |
| { |
| ext->info->enable(ext, ~0, false); |
| pci_free_irq(ext->bp->pdev, ext->irq_vec, ext); |
| kfree(ext); |
| } |
| |
| static int |
| ptp_ocp_register_ext(struct ptp_ocp *bp, struct ocp_resource *r) |
| { |
| struct pci_dev *pdev = bp->pdev; |
| struct ptp_ocp_ext_src *ext; |
| int err; |
| |
| ext = kzalloc(sizeof(*ext), GFP_KERNEL); |
| if (!ext) |
| return -ENOMEM; |
| |
| err = -EINVAL; |
| ext->mem = ptp_ocp_get_mem(bp, r); |
| if (!ext->mem) |
| goto out; |
| |
| ext->bp = bp; |
| ext->info = r->extra; |
| ext->irq_vec = r->irq_vec; |
| |
| err = pci_request_irq(pdev, r->irq_vec, ext->info->irq_fcn, NULL, |
| ext, "ocp%d.%s", bp->id, r->name); |
| if (err) { |
| dev_err(&pdev->dev, "Could not get irq %d\n", r->irq_vec); |
| goto out; |
| } |
| |
| bp_assign_entry(bp, r, ext); |
| |
| return 0; |
| |
| out: |
| kfree(ext); |
| return err; |
| } |
| |
| static int |
| ptp_ocp_serial_line(struct ptp_ocp *bp, struct ocp_resource *r) |
| { |
| struct pci_dev *pdev = bp->pdev; |
| struct uart_8250_port uart; |
| |
| /* Setting UPF_IOREMAP and leaving port.membase unspecified lets |
| * the serial port device claim and release the pci resource. |
| */ |
| memset(&uart, 0, sizeof(uart)); |
| uart.port.dev = &pdev->dev; |
| uart.port.iotype = UPIO_MEM; |
| uart.port.regshift = 2; |
| uart.port.mapbase = pci_resource_start(pdev, 0) + r->offset; |
| uart.port.irq = pci_irq_vector(pdev, r->irq_vec); |
| uart.port.uartclk = 50000000; |
| uart.port.flags = UPF_FIXED_TYPE | UPF_IOREMAP; |
| uart.port.type = PORT_16550A; |
| |
| return serial8250_register_8250_port(&uart); |
| } |
| |
| static int |
| ptp_ocp_register_serial(struct ptp_ocp *bp, struct ocp_resource *r) |
| { |
| int port; |
| |
| port = ptp_ocp_serial_line(bp, r); |
| if (port < 0) |
| return port; |
| |
| bp_assign_entry(bp, r, port); |
| |
| return 0; |
| } |
| |
| static int |
| ptp_ocp_register_mem(struct ptp_ocp *bp, struct ocp_resource *r) |
| { |
| void __iomem *mem; |
| |
| mem = ptp_ocp_get_mem(bp, r); |
| if (!mem) |
| return -EINVAL; |
| |
| bp_assign_entry(bp, r, mem); |
| |
| return 0; |
| } |
| |
| static void |
| ptp_ocp_nmea_out_init(struct ptp_ocp *bp) |
| { |
| if (!bp->nmea_out) |
| return; |
| |
| iowrite32(0, &bp->nmea_out->ctrl); /* disable */ |
| iowrite32(7, &bp->nmea_out->uart_baud); /* 115200 */ |
| iowrite32(1, &bp->nmea_out->ctrl); /* enable */ |
| } |
| |
| /* FB specific board initializers; last "resource" registered. */ |
| static int |
| ptp_ocp_fb_board_init(struct ptp_ocp *bp, struct ocp_resource *r) |
| { |
| bp->flash_start = 1024 * 4096; |
| |
| ptp_ocp_tod_init(bp); |
| ptp_ocp_nmea_out_init(bp); |
| |
| return ptp_ocp_init_clock(bp); |
| } |
| |
| static bool |
| ptp_ocp_allow_irq(struct ptp_ocp *bp, struct ocp_resource *r) |
| { |
| bool allow = !r->irq_vec || r->irq_vec < bp->n_irqs; |
| |
| if (!allow) |
| dev_err(&bp->pdev->dev, "irq %d out of range, skipping %s\n", |
| r->irq_vec, r->name); |
| return allow; |
| } |
| |
| static int |
| ptp_ocp_register_resources(struct ptp_ocp *bp, kernel_ulong_t driver_data) |
| { |
| struct ocp_resource *r, *table; |
| int err = 0; |
| |
| table = (struct ocp_resource *)driver_data; |
| for (r = table; r->setup; r++) { |
| if (!ptp_ocp_allow_irq(bp, r)) |
| continue; |
| err = r->setup(bp, r); |
| if (err) { |
| dev_err(&bp->pdev->dev, |
| "Could not register %s: err %d\n", |
| r->name, err); |
| break; |
| } |
| } |
| return err; |
| } |
| |
| static void |
| ptp_ocp_enable_fpga(u32 __iomem *reg, u32 bit, bool enable) |
| { |
| u32 ctrl; |
| bool on; |
| |
| ctrl = ioread32(reg); |
| on = ctrl & bit; |
| if (on ^ enable) { |
| ctrl &= ~bit; |
| ctrl |= enable ? bit : 0; |
| iowrite32(ctrl, reg); |
| } |
| } |
| |
| static void |
| ptp_ocp_irig_out(struct ptp_ocp *bp, bool enable) |
| { |
| return ptp_ocp_enable_fpga(&bp->irig_out->ctrl, |
| IRIG_M_CTRL_ENABLE, enable); |
| } |
| |
| static void |
| ptp_ocp_irig_in(struct ptp_ocp *bp, bool enable) |
| { |
| return ptp_ocp_enable_fpga(&bp->irig_in->ctrl, |
| IRIG_S_CTRL_ENABLE, enable); |
| } |
| |
| static void |
| ptp_ocp_dcf_out(struct ptp_ocp *bp, bool enable) |
| { |
| return ptp_ocp_enable_fpga(&bp->dcf_out->ctrl, |
| DCF_M_CTRL_ENABLE, enable); |
| } |
| |
| static void |
| ptp_ocp_dcf_in(struct ptp_ocp *bp, bool enable) |
| { |
| return ptp_ocp_enable_fpga(&bp->dcf_in->ctrl, |
| DCF_S_CTRL_ENABLE, enable); |
| } |
| |
| static void |
| __handle_signal_outputs(struct ptp_ocp *bp, u32 val) |
| { |
| ptp_ocp_irig_out(bp, val & 0x00100010); |
| ptp_ocp_dcf_out(bp, val & 0x00200020); |
| } |
| |
| static void |
| __handle_signal_inputs(struct ptp_ocp *bp, u32 val) |
| { |
| ptp_ocp_irig_in(bp, val & 0x00100010); |
| ptp_ocp_dcf_in(bp, val & 0x00200020); |
| } |
| |
| /* |
| * ANT0 == gps (in) |
| * ANT1 == sma1 (in) |
| * ANT2 == sma2 (in) |
| * ANT3 == sma3 (out) |
| * ANT4 == sma4 (out) |
| */ |
| |
| enum ptp_ocp_sma_mode { |
| SMA_MODE_IN, |
| SMA_MODE_OUT, |
| }; |
| |
| static struct ptp_ocp_sma_connector { |
| enum ptp_ocp_sma_mode mode; |
| bool fixed_mode; |
| u16 default_out_idx; |
| } ptp_ocp_sma_map[4] = { |
| { |
| .mode = SMA_MODE_IN, |
| .fixed_mode = true, |
| }, |
| { |
| .mode = SMA_MODE_IN, |
| .fixed_mode = true, |
| }, |
| { |
| .mode = SMA_MODE_OUT, |
| .fixed_mode = true, |
| .default_out_idx = 0, /* 10Mhz */ |
| }, |
| { |
| .mode = SMA_MODE_OUT, |
| .fixed_mode = true, |
| .default_out_idx = 1, /* PHC */ |
| }, |
| }; |
| |
| static ssize_t |
| ptp_ocp_show_output(u32 val, char *buf, int default_idx) |
| { |
| const char *name; |
| ssize_t count; |
| |
| count = sysfs_emit(buf, "OUT: "); |
| name = ptp_ocp_select_name_from_val(ptp_ocp_sma_out, val); |
| if (!name) |
| name = ptp_ocp_sma_out[default_idx].name; |
| count += sysfs_emit_at(buf, count, "%s\n", name); |
| return count; |
| } |
| |
| static ssize_t |
| ptp_ocp_show_inputs(u32 val, char *buf, const char *zero_in) |
| { |
| const char *name; |
| ssize_t count; |
| int i; |
| |
| count = sysfs_emit(buf, "IN: "); |
| for (i = 0; i < ARRAY_SIZE(ptp_ocp_sma_in); i++) { |
| if (val & ptp_ocp_sma_in[i].value) { |
| name = ptp_ocp_sma_in[i].name; |
| count += sysfs_emit_at(buf, count, "%s ", name); |
| } |
| } |
| if (!val && zero_in) |
| count += sysfs_emit_at(buf, count, "%s ", zero_in); |
| if (count) |
| count--; |
| count += sysfs_emit_at(buf, count, "\n"); |
| return count; |
| } |
| |
| static int |
| sma_parse_inputs(const char *buf, enum ptp_ocp_sma_mode *mode) |
| { |
| struct ocp_selector *tbl[] = { ptp_ocp_sma_in, ptp_ocp_sma_out }; |
| int idx, count, dir; |
| char **argv; |
| int ret; |
| |
| argv = argv_split(GFP_KERNEL, buf, &count); |
| if (!argv) |
| return -ENOMEM; |
| |
| ret = -EINVAL; |
| if (!count) |
| goto out; |
| |
| idx = 0; |
| dir = *mode == SMA_MODE_IN ? 0 : 1; |
| if (!strcasecmp("IN:", argv[idx])) { |
| dir = 0; |
| idx++; |
| } |
| if (!strcasecmp("OUT:", argv[0])) { |
| dir = 1; |
| idx++; |
| } |
| *mode = dir == 0 ? SMA_MODE_IN : SMA_MODE_OUT; |
| |
| ret = 0; |
| for (; idx < count; idx++) |
| ret |= ptp_ocp_select_val_from_name(tbl[dir], argv[idx]); |
| if (ret < 0) |
| ret = -EINVAL; |
| |
| out: |
| argv_free(argv); |
| return ret; |
| } |
| |
| static ssize_t |
| ptp_ocp_sma_show(struct ptp_ocp *bp, int sma_nr, u32 val, char *buf, |
| const char *zero_in) |
| { |
| struct ptp_ocp_sma_connector *sma = &ptp_ocp_sma_map[sma_nr - 1]; |
| |
| if (sma->mode == SMA_MODE_IN) |
| return ptp_ocp_show_inputs(val, buf, zero_in); |
| |
| return ptp_ocp_show_output(val, buf, sma->default_out_idx); |
| } |
| |
| static ssize_t |
| sma1_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| u32 val; |
| |
| val = ioread32(&bp->sma->gpio1) & 0x3f; |
| return ptp_ocp_sma_show(bp, 1, val, buf, ptp_ocp_sma_in[0].name); |
| } |
| |
| static ssize_t |
| sma2_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| u32 val; |
| |
| val = (ioread32(&bp->sma->gpio1) >> 16) & 0x3f; |
| return ptp_ocp_sma_show(bp, 2, val, buf, NULL); |
| } |
| |
| static ssize_t |
| sma3_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| u32 val; |
| |
| val = ioread32(&bp->sma->gpio2) & 0x3f; |
| return ptp_ocp_sma_show(bp, 3, val, buf, NULL); |
| } |
| |
| static ssize_t |
| sma4_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| u32 val; |
| |
| val = (ioread32(&bp->sma->gpio2) >> 16) & 0x3f; |
| return ptp_ocp_sma_show(bp, 4, val, buf, NULL); |
| } |
| |
| static void |
| ptp_ocp_sma_store_output(struct ptp_ocp *bp, u32 val, u32 shift) |
| { |
| unsigned long flags; |
| u32 gpio, mask; |
| |
| mask = 0xffff << (16 - shift); |
| |
| spin_lock_irqsave(&bp->lock, flags); |
| |
| gpio = ioread32(&bp->sma->gpio2); |
| gpio = (gpio & mask) | (val << shift); |
| |
| __handle_signal_outputs(bp, gpio); |
| |
| iowrite32(gpio, &bp->sma->gpio2); |
| |
| spin_unlock_irqrestore(&bp->lock, flags); |
| } |
| |
| static void |
| ptp_ocp_sma_store_inputs(struct ptp_ocp *bp, u32 val, u32 shift) |
| { |
| unsigned long flags; |
| u32 gpio, mask; |
| |
| mask = 0xffff << (16 - shift); |
| |
| spin_lock_irqsave(&bp->lock, flags); |
| |
| gpio = ioread32(&bp->sma->gpio1); |
| gpio = (gpio & mask) | (val << shift); |
| |
| __handle_signal_inputs(bp, gpio); |
| |
| iowrite32(gpio, &bp->sma->gpio1); |
| |
| spin_unlock_irqrestore(&bp->lock, flags); |
| } |
| |
| static ssize_t |
| ptp_ocp_sma_store(struct ptp_ocp *bp, const char *buf, int sma_nr, u32 shift) |
| { |
| struct ptp_ocp_sma_connector *sma = &ptp_ocp_sma_map[sma_nr - 1]; |
| enum ptp_ocp_sma_mode mode; |
| int val; |
| |
| mode = sma->mode; |
| val = sma_parse_inputs(buf, &mode); |
| if (val < 0) |
| return val; |
| |
| if (mode != sma->mode && sma->fixed_mode) |
| return -EOPNOTSUPP; |
| |
| if (mode != sma->mode) { |
| pr_err("Mode changes not supported yet.\n"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (sma->mode == SMA_MODE_IN) |
| ptp_ocp_sma_store_inputs(bp, val, shift); |
| else |
| ptp_ocp_sma_store_output(bp, val, shift); |
| |
| return 0; |
| } |
| |
| static ssize_t |
| sma1_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| int err; |
| |
| err = ptp_ocp_sma_store(bp, buf, 1, 0); |
| return err ? err : count; |
| } |
| |
| static ssize_t |
| sma2_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| int err; |
| |
| err = ptp_ocp_sma_store(bp, buf, 2, 16); |
| return err ? err : count; |
| } |
| |
| static ssize_t |
| sma3_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| int err; |
| |
| err = ptp_ocp_sma_store(bp, buf, 3, 0); |
| return err ? err : count; |
| } |
| |
| static ssize_t |
| sma4_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| int err; |
| |
| err = ptp_ocp_sma_store(bp, buf, 4, 16); |
| return err ? err : count; |
| } |
| static DEVICE_ATTR_RW(sma1); |
| static DEVICE_ATTR_RW(sma2); |
| static DEVICE_ATTR_RW(sma3); |
| static DEVICE_ATTR_RW(sma4); |
| |
| static ssize_t |
| available_sma_inputs_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| return ptp_ocp_select_table_show(ptp_ocp_sma_in, buf); |
| } |
| static DEVICE_ATTR_RO(available_sma_inputs); |
| |
| static ssize_t |
| available_sma_outputs_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| return ptp_ocp_select_table_show(ptp_ocp_sma_out, buf); |
| } |
| static DEVICE_ATTR_RO(available_sma_outputs); |
| |
| static ssize_t |
| serialnum_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| |
| if (!bp->has_serial) |
| ptp_ocp_get_serial_number(bp); |
| |
| return sysfs_emit(buf, "%pM\n", bp->serial); |
| } |
| static DEVICE_ATTR_RO(serialnum); |
| |
| static ssize_t |
| gnss_sync_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| ssize_t ret; |
| |
| if (bp->gnss_lost) |
| ret = sysfs_emit(buf, "LOST @ %ptT\n", &bp->gnss_lost); |
| else |
| ret = sysfs_emit(buf, "SYNC\n"); |
| |
| return ret; |
| } |
| static DEVICE_ATTR_RO(gnss_sync); |
| |
| static ssize_t |
| utc_tai_offset_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| |
| return sysfs_emit(buf, "%d\n", bp->utc_tai_offset); |
| } |
| |
| static ssize_t |
| utc_tai_offset_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| int err; |
| u32 val; |
| |
| err = kstrtou32(buf, 0, &val); |
| if (err) |
| return err; |
| |
| ptp_ocp_utc_distribute(bp, val); |
| |
| return count; |
| } |
| static DEVICE_ATTR_RW(utc_tai_offset); |
| |
| static ssize_t |
| ts_window_adjust_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| |
| return sysfs_emit(buf, "%d\n", bp->ts_window_adjust); |
| } |
| |
| static ssize_t |
| ts_window_adjust_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| int err; |
| u32 val; |
| |
| err = kstrtou32(buf, 0, &val); |
| if (err) |
| return err; |
| |
| bp->ts_window_adjust = val; |
| |
| return count; |
| } |
| static DEVICE_ATTR_RW(ts_window_adjust); |
| |
| static ssize_t |
| irig_b_mode_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| u32 val; |
| |
| val = ioread32(&bp->irig_out->ctrl); |
| val = (val >> 16) & 0x07; |
| return sysfs_emit(buf, "%d\n", val); |
| } |
| |
| static ssize_t |
| irig_b_mode_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| unsigned long flags; |
| int err; |
| u32 reg; |
| u8 val; |
| |
| err = kstrtou8(buf, 0, &val); |
| if (err) |
| return err; |
| if (val > 7) |
| return -EINVAL; |
| |
| reg = ((val & 0x7) << 16); |
| |
| spin_lock_irqsave(&bp->lock, flags); |
| iowrite32(0, &bp->irig_out->ctrl); /* disable */ |
| iowrite32(reg, &bp->irig_out->ctrl); /* change mode */ |
| iowrite32(reg | IRIG_M_CTRL_ENABLE, &bp->irig_out->ctrl); |
| spin_unlock_irqrestore(&bp->lock, flags); |
| |
| return count; |
| } |
| static DEVICE_ATTR_RW(irig_b_mode); |
| |
| static ssize_t |
| clock_source_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| const char *p; |
| u32 select; |
| |
| select = ioread32(&bp->reg->select); |
| p = ptp_ocp_select_name_from_val(ptp_ocp_clock, select >> 16); |
| |
| return sysfs_emit(buf, "%s\n", p); |
| } |
| |
| static ssize_t |
| clock_source_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| unsigned long flags; |
| int val; |
| |
| val = ptp_ocp_select_val_from_name(ptp_ocp_clock, buf); |
| if (val < 0) |
| return val; |
| |
| spin_lock_irqsave(&bp->lock, flags); |
| iowrite32(val, &bp->reg->select); |
| spin_unlock_irqrestore(&bp->lock, flags); |
| |
| return count; |
| } |
| static DEVICE_ATTR_RW(clock_source); |
| |
| static ssize_t |
| available_clock_sources_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| return ptp_ocp_select_table_show(ptp_ocp_clock, buf); |
| } |
| static DEVICE_ATTR_RO(available_clock_sources); |
| |
| static struct attribute *timecard_attrs[] = { |
| &dev_attr_serialnum.attr, |
| &dev_attr_gnss_sync.attr, |
| &dev_attr_clock_source.attr, |
| &dev_attr_available_clock_sources.attr, |
| &dev_attr_sma1.attr, |
| &dev_attr_sma2.attr, |
| &dev_attr_sma3.attr, |
| &dev_attr_sma4.attr, |
| &dev_attr_available_sma_inputs.attr, |
| &dev_attr_available_sma_outputs.attr, |
| &dev_attr_irig_b_mode.attr, |
| &dev_attr_utc_tai_offset.attr, |
| &dev_attr_ts_window_adjust.attr, |
| NULL, |
| }; |
| ATTRIBUTE_GROUPS(timecard); |
| |
| static const char * |
| gpio_map(u32 gpio, u32 bit, const char *pri, const char *sec, const char *def) |
| { |
| const char *ans; |
| |
| if (gpio & (1 << bit)) |
| ans = pri; |
| else if (gpio & (1 << (bit + 16))) |
| ans = sec; |
| else |
| ans = def; |
| return ans; |
| } |
| |
| static void |
| gpio_multi_map(char *buf, u32 gpio, u32 bit, |
| const char *pri, const char *sec, const char *def) |
| { |
| char *ans = buf; |
| |
| strcpy(ans, def); |
| if (gpio & (1 << bit)) |
| ans += sprintf(ans, "%s ", pri); |
| if (gpio & (1 << (bit + 16))) |
| ans += sprintf(ans, "%s ", sec); |
| } |
| |
| static int |
| ptp_ocp_summary_show(struct seq_file *s, void *data) |
| { |
| struct device *dev = s->private; |
| struct ptp_system_timestamp sts; |
| u32 sma_in, sma_out, ctrl, val; |
| struct ts_reg __iomem *ts_reg; |
| struct timespec64 ts; |
| struct ptp_ocp *bp; |
| const char *src; |
| bool on, map; |
| char *buf; |
| |
| buf = (char *)__get_free_page(GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| bp = dev_get_drvdata(dev); |
| sma_in = ioread32(&bp->sma->gpio1); |
| sma_out = ioread32(&bp->sma->gpio2); |
| |
| seq_printf(s, "%7s: /dev/ptp%d\n", "PTP", ptp_clock_index(bp->ptp)); |
| |
| sma1_show(dev, NULL, buf); |
| seq_printf(s, " sma1: %s", buf); |
| |
| sma2_show(dev, NULL, buf); |
| seq_printf(s, " sma2: %s", buf); |
| |
| sma3_show(dev, NULL, buf); |
| seq_printf(s, " sma3: %s", buf); |
| |
| sma4_show(dev, NULL, buf); |
| seq_printf(s, " sma4: %s", buf); |
| |
| if (bp->ts0) { |
| ts_reg = bp->ts0->mem; |
| on = ioread32(&ts_reg->enable); |
| src = "GNSS"; |
| seq_printf(s, "%7s: %s, src: %s\n", "TS0", |
| on ? " ON" : "OFF", src); |
| } |
| |
| if (bp->ts1) { |
| ts_reg = bp->ts1->mem; |
| on = ioread32(&ts_reg->enable); |
| src = gpio_map(sma_in, 2, "sma1", "sma2", "----"); |
| seq_printf(s, "%7s: %s, src: %s\n", "TS1", |
| on ? " ON" : "OFF", src); |
| } |
| |
| if (bp->ts2) { |
| ts_reg = bp->ts2->mem; |
| on = ioread32(&ts_reg->enable); |
| src = gpio_map(sma_in, 3, "sma1", "sma2", "----"); |
| seq_printf(s, "%7s: %s, src: %s\n", "TS2", |
| on ? " ON" : "OFF", src); |
| } |
| |
| if (bp->pps) { |
| ts_reg = bp->pps->mem; |
| src = "PHC"; |
| on = ioread32(&ts_reg->enable); |
| map = !!(bp->pps_req_map & OCP_REQ_TIMESTAMP); |
| seq_printf(s, "%7s: %s, src: %s\n", "TS3", |
| on && map ? " ON" : "OFF", src); |
| |
| map = !!(bp->pps_req_map & OCP_REQ_PPS); |
| seq_printf(s, "%7s: %s, src: %s\n", "PPS", |
| on && map ? " ON" : "OFF", src); |
| } |
| |
| if (bp->irig_out) { |
| ctrl = ioread32(&bp->irig_out->ctrl); |
| on = ctrl & IRIG_M_CTRL_ENABLE; |
| val = ioread32(&bp->irig_out->status); |
| gpio_multi_map(buf, sma_out, 4, "sma3", "sma4", "----"); |
| seq_printf(s, "%7s: %s, error: %d, mode %d, out: %s\n", "IRIG", |
| on ? " ON" : "OFF", val, (ctrl >> 16), buf); |
| } |
| |
| if (bp->irig_in) { |
| on = ioread32(&bp->irig_in->ctrl) & IRIG_S_CTRL_ENABLE; |
| val = ioread32(&bp->irig_in->status); |
| src = gpio_map(sma_in, 4, "sma1", "sma2", "----"); |
| seq_printf(s, "%7s: %s, error: %d, src: %s\n", "IRIG in", |
| on ? " ON" : "OFF", val, src); |
| } |
| |
| if (bp->dcf_out) { |
| on = ioread32(&bp->dcf_out->ctrl) & DCF_M_CTRL_ENABLE; |
| val = ioread32(&bp->dcf_out->status); |
| gpio_multi_map(buf, sma_out, 5, "sma3", "sma4", "----"); |
| seq_printf(s, "%7s: %s, error: %d, out: %s\n", "DCF", |
| on ? " ON" : "OFF", val, buf); |
| } |
| |
| if (bp->dcf_in) { |
| on = ioread32(&bp->dcf_in->ctrl) & DCF_S_CTRL_ENABLE; |
| val = ioread32(&bp->dcf_in->status); |
| src = gpio_map(sma_in, 5, "sma1", "sma2", "----"); |
| seq_printf(s, "%7s: %s, error: %d, src: %s\n", "DCF in", |
| on ? " ON" : "OFF", val, src); |
| } |
| |
| if (bp->nmea_out) { |
| on = ioread32(&bp->nmea_out->ctrl) & 1; |
| val = ioread32(&bp->nmea_out->status); |
| seq_printf(s, "%7s: %s, error: %d\n", "NMEA", |
| on ? " ON" : "OFF", val); |
| } |
| |
| /* compute src for PPS1, used below. */ |
| if (bp->pps_select) { |
| val = ioread32(&bp->pps_select->gpio1); |
| if (val & 0x01) |
| src = gpio_map(sma_in, 0, "sma1", "sma2", "----"); |
| else if (val & 0x02) |
| src = "MAC"; |
| else if (val & 0x04) |
| src = "GNSS"; |
| else |
| src = "----"; |
| } else { |
| src = "?"; |
| } |
| |
| /* assumes automatic switchover/selection */ |
| val = ioread32(&bp->reg->select); |
| switch (val >> 16) { |
| case 0: |
| sprintf(buf, "----"); |
| break; |
| case 2: |
| sprintf(buf, "IRIG"); |
| break; |
| case 3: |
| sprintf(buf, "%s via PPS1", src); |
| break; |
| case 6: |
| sprintf(buf, "DCF"); |
| break; |
| default: |
| strcpy(buf, "unknown"); |
| break; |
| } |
| val = ioread32(&bp->reg->status); |
| seq_printf(s, "%7s: %s, state: %s\n", "PHC src", buf, |
| val & OCP_STATUS_IN_SYNC ? "sync" : "unsynced"); |
| |
| /* reuses PPS1 src from earlier */ |
| seq_printf(s, "MAC PPS1 src: %s\n", src); |
| |
| src = gpio_map(sma_in, 1, "sma1", "sma2", "GNSS2"); |
| seq_printf(s, "MAC PPS2 src: %s\n", src); |
| |
| if (!ptp_ocp_gettimex(&bp->ptp_info, &ts, &sts)) { |
| struct timespec64 sys_ts; |
| s64 pre_ns, post_ns, ns; |
| |
| pre_ns = timespec64_to_ns(&sts.pre_ts); |
| post_ns = timespec64_to_ns(&sts.post_ts); |
| ns = (pre_ns + post_ns) / 2; |
| ns += (s64)bp->utc_tai_offset * NSEC_PER_SEC; |
| sys_ts = ns_to_timespec64(ns); |
| |
| seq_printf(s, "%7s: %lld.%ld == %ptT TAI\n", "PHC", |
| ts.tv_sec, ts.tv_nsec, &ts); |
| seq_printf(s, "%7s: %lld.%ld == %ptT UTC offset %d\n", "SYS", |
| sys_ts.tv_sec, sys_ts.tv_nsec, &sys_ts, |
| bp->utc_tai_offset); |
| seq_printf(s, "%7s: PHC:SYS offset: %lld window: %lld\n", "", |
| timespec64_to_ns(&ts) - ns, |
| post_ns - pre_ns); |
| } |
| |
| free_page((unsigned long)buf); |
| return 0; |
| } |
| DEFINE_SHOW_ATTRIBUTE(ptp_ocp_summary); |
| |
| static struct dentry *ptp_ocp_debugfs_root; |
| |
| static void |
| ptp_ocp_debugfs_add_device(struct ptp_ocp *bp) |
| { |
| struct dentry *d; |
| |
| d = debugfs_create_dir(dev_name(&bp->dev), ptp_ocp_debugfs_root); |
| bp->debug_root = d; |
| debugfs_create_file("summary", 0444, bp->debug_root, |
| &bp->dev, &ptp_ocp_summary_fops); |
| } |
| |
| static void |
| ptp_ocp_debugfs_remove_device(struct ptp_ocp *bp) |
| { |
| debugfs_remove_recursive(bp->debug_root); |
| } |
| |
| static void |
| ptp_ocp_debugfs_init(void) |
| { |
| ptp_ocp_debugfs_root = debugfs_create_dir("timecard", NULL); |
| } |
| |
| static void |
| ptp_ocp_debugfs_fini(void) |
| { |
| debugfs_remove_recursive(ptp_ocp_debugfs_root); |
| } |
| |
| static void |
| ptp_ocp_dev_release(struct device *dev) |
| { |
| struct ptp_ocp *bp = dev_get_drvdata(dev); |
| |
| mutex_lock(&ptp_ocp_lock); |
| idr_remove(&ptp_ocp_idr, bp->id); |
| mutex_unlock(&ptp_ocp_lock); |
| } |
| |
| static int |
| ptp_ocp_device_init(struct ptp_ocp *bp, struct pci_dev *pdev) |
| { |
| int err; |
| |
| mutex_lock(&ptp_ocp_lock); |
| err = idr_alloc(&ptp_ocp_idr, bp, 0, 0, GFP_KERNEL); |
| mutex_unlock(&ptp_ocp_lock); |
| if (err < 0) { |
| dev_err(&pdev->dev, "idr_alloc failed: %d\n", err); |
| return err; |
| } |
| bp->id = err; |
| |
| bp->ptp_info = ptp_ocp_clock_info; |
| spin_lock_init(&bp->lock); |
| bp->gnss_port = -1; |
| bp->gnss2_port = -1; |
| bp->mac_port = -1; |
| bp->nmea_port = -1; |
| bp->pdev = pdev; |
| |
| device_initialize(&bp->dev); |
| dev_set_name(&bp->dev, "ocp%d", bp->id); |
| bp->dev.class = &timecard_class; |
| bp->dev.parent = &pdev->dev; |
| bp->dev.release = ptp_ocp_dev_release; |
| dev_set_drvdata(&bp->dev, bp); |
| |
| err = device_add(&bp->dev); |
| if (err) { |
| dev_err(&bp->dev, "device add failed: %d\n", err); |
| goto out; |
| } |
| |
| pci_set_drvdata(pdev, bp); |
| |
| return 0; |
| |
| out: |
| ptp_ocp_dev_release(&bp->dev); |
| put_device(&bp->dev); |
| return err; |
| } |
| |
| static void |
| ptp_ocp_symlink(struct ptp_ocp *bp, struct device *child, const char *link) |
| { |
| struct device *dev = &bp->dev; |
| |
| if (sysfs_create_link(&dev->kobj, &child->kobj, link)) |
| dev_err(dev, "%s symlink failed\n", link); |
| } |
| |
| static void |
| ptp_ocp_link_child(struct ptp_ocp *bp, const char *name, const char *link) |
| { |
| struct device *dev, *child; |
| |
| dev = &bp->pdev->dev; |
| |
| child = device_find_child_by_name(dev, name); |
| if (!child) { |
| dev_err(dev, "Could not find device %s\n", name); |
| return; |
| } |
| |
| ptp_ocp_symlink(bp, child, link); |
| put_device(child); |
| } |
| |
| static int |
| ptp_ocp_complete(struct ptp_ocp *bp) |
| { |
| struct pps_device *pps; |
| char buf[32]; |
| |
| if (bp->gnss_port != -1) { |
| sprintf(buf, "ttyS%d", bp->gnss_port); |
| ptp_ocp_link_child(bp, buf, "ttyGNSS"); |
| } |
| if (bp->gnss2_port != -1) { |
| sprintf(buf, "ttyS%d", bp->gnss2_port); |
| ptp_ocp_link_child(bp, buf, "ttyGNSS2"); |
| } |
| if (bp->mac_port != -1) { |
| sprintf(buf, "ttyS%d", bp->mac_port); |
| ptp_ocp_link_child(bp, buf, "ttyMAC"); |
| } |
| if (bp->nmea_port != -1) { |
| sprintf(buf, "ttyS%d", bp->nmea_port); |
| ptp_ocp_link_child(bp, buf, "ttyNMEA"); |
| } |
| sprintf(buf, "ptp%d", ptp_clock_index(bp->ptp)); |
| ptp_ocp_link_child(bp, buf, "ptp"); |
| |
| pps = pps_lookup_dev(bp->ptp); |
| if (pps) |
| ptp_ocp_symlink(bp, pps->dev, "pps"); |
| |
| if (device_add_groups(&bp->dev, timecard_groups)) |
| pr_err("device add groups failed\n"); |
| |
| ptp_ocp_debugfs_add_device(bp); |
| |
| return 0; |
| } |
| |
| static void |
| ptp_ocp_phc_info(struct ptp_ocp *bp) |
| { |
| struct timespec64 ts; |
| u32 version, select; |
| bool sync; |
| |
| version = ioread32(&bp->reg->version); |
| select = ioread32(&bp->reg->select); |
| dev_info(&bp->pdev->dev, "Version %d.%d.%d, clock %s, device ptp%d\n", |
| version >> 24, (version >> 16) & 0xff, version & 0xffff, |
| ptp_ocp_select_name_from_val(ptp_ocp_clock, select >> 16), |
| ptp_clock_index(bp->ptp)); |
| |
| sync = ioread32(&bp->reg->status) & OCP_STATUS_IN_SYNC; |
| if (!ptp_ocp_gettimex(&bp->ptp_info, &ts, NULL)) |
| dev_info(&bp->pdev->dev, "Time: %lld.%ld, %s\n", |
| ts.tv_sec, ts.tv_nsec, |
| sync ? "in-sync" : "UNSYNCED"); |
| } |
| |
| static void |
| ptp_ocp_serial_info(struct device *dev, const char *name, int port, int baud) |
| { |
| if (port != -1) |
| dev_info(dev, "%5s: /dev/ttyS%-2d @ %6d\n", name, port, baud); |
| } |
| |
| static void |
| ptp_ocp_info(struct ptp_ocp *bp) |
| { |
| static int nmea_baud[] = { |
| 1200, 2400, 4800, 9600, 19200, 38400, |
| 57600, 115200, 230400, 460800, 921600, |
| 1000000, 2000000 |
| }; |
| struct device *dev = &bp->pdev->dev; |
| u32 reg; |
| |
| ptp_ocp_phc_info(bp); |
| if (bp->tod) |
| ptp_ocp_tod_info(bp); |
| |
| if (bp->image) { |
| u32 ver = ioread32(&bp->image->version); |
| |
| dev_info(dev, "version %x\n", ver); |
| if (ver & 0xffff) |
| dev_info(dev, "regular image, version %d\n", |
| ver & 0xffff); |
| else |
| dev_info(dev, "golden image, version %d\n", |
| ver >> 16); |
| } |
| ptp_ocp_serial_info(dev, "GNSS", bp->gnss_port, 115200); |
| ptp_ocp_serial_info(dev, "GNSS2", bp->gnss2_port, 115200); |
| ptp_ocp_serial_info(dev, "MAC", bp->mac_port, 57600); |
| if (bp->nmea_out && bp->nmea_port != -1) { |
| int baud = -1; |
| |
| reg = ioread32(&bp->nmea_out->uart_baud); |
| if (reg < ARRAY_SIZE(nmea_baud)) |
| baud = nmea_baud[reg]; |
| ptp_ocp_serial_info(dev, "NMEA", bp->nmea_port, baud); |
| } |
| } |
| |
| static void |
| ptp_ocp_detach_sysfs(struct ptp_ocp *bp) |
| { |
| struct device *dev = &bp->dev; |
| |
| sysfs_remove_link(&dev->kobj, "ttyGNSS"); |
| sysfs_remove_link(&dev->kobj, "ttyMAC"); |
| sysfs_remove_link(&dev->kobj, "ptp"); |
| sysfs_remove_link(&dev->kobj, "pps"); |
| device_remove_groups(dev, timecard_groups); |
| } |
| |
| static void |
| ptp_ocp_detach(struct ptp_ocp *bp) |
| { |
| ptp_ocp_debugfs_remove_device(bp); |
| ptp_ocp_detach_sysfs(bp); |
| if (timer_pending(&bp->watchdog)) |
| del_timer_sync(&bp->watchdog); |
| if (bp->ts0) |
| ptp_ocp_unregister_ext(bp->ts0); |
| if (bp->ts1) |
| ptp_ocp_unregister_ext(bp->ts1); |
| if (bp->ts2) |
| ptp_ocp_unregister_ext(bp->ts2); |
| if (bp->pps) |
| ptp_ocp_unregister_ext(bp->pps); |
| if (bp->gnss_port != -1) |
| serial8250_unregister_port(bp->gnss_port); |
| if (bp->gnss2_port != -1) |
| serial8250_unregister_port(bp->gnss2_port); |
| if (bp->mac_port != -1) |
| serial8250_unregister_port(bp->mac_port); |
| if (bp->nmea_port != -1) |
| serial8250_unregister_port(bp->nmea_port); |
| if (bp->spi_flash) |
| platform_device_unregister(bp->spi_flash); |
| if (bp->i2c_ctrl) |
| platform_device_unregister(bp->i2c_ctrl); |
| if (bp->i2c_clk) |
| clk_hw_unregister_fixed_rate(bp->i2c_clk); |
| if (bp->n_irqs) |
| pci_free_irq_vectors(bp->pdev); |
| if (bp->ptp) |
| ptp_clock_unregister(bp->ptp); |
| device_unregister(&bp->dev); |
| } |
| |
| static int |
| ptp_ocp_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| { |
| struct devlink *devlink; |
| struct ptp_ocp *bp; |
| int err; |
| |
| devlink = devlink_alloc(&ptp_ocp_devlink_ops, sizeof(*bp), &pdev->dev); |
| if (!devlink) { |
| dev_err(&pdev->dev, "devlink_alloc failed\n"); |
| return -ENOMEM; |
| } |
| |
| err = pci_enable_device(pdev); |
| if (err) { |
| dev_err(&pdev->dev, "pci_enable_device\n"); |
| goto out_unregister; |
| } |
| |
| bp = devlink_priv(devlink); |
| err = ptp_ocp_device_init(bp, pdev); |
| if (err) |
| goto out_disable; |
| |
| /* compat mode. |
| * Older FPGA firmware only returns 2 irq's. |
| * allow this - if not all of the IRQ's are returned, skip the |
| * extra devices and just register the clock. |
| */ |
| err = pci_alloc_irq_vectors(pdev, 1, 11, PCI_IRQ_MSI | PCI_IRQ_MSIX); |
| if (err < 0) { |
| dev_err(&pdev->dev, "alloc_irq_vectors err: %d\n", err); |
| goto out; |
| } |
| bp->n_irqs = err; |
| pci_set_master(pdev); |
| |
| err = ptp_ocp_register_resources(bp, id->driver_data); |
| if (err) |
| goto out; |
| |
| bp->ptp = ptp_clock_register(&bp->ptp_info, &pdev->dev); |
| if (IS_ERR(bp->ptp)) { |
| err = PTR_ERR(bp->ptp); |
| dev_err(&pdev->dev, "ptp_clock_register: %d\n", err); |
| bp->ptp = NULL; |
| goto out; |
| } |
| |
| err = ptp_ocp_complete(bp); |
| if (err) |
| goto out; |
| |
| ptp_ocp_info(bp); |
| devlink_register(devlink); |
| return 0; |
| |
| out: |
| ptp_ocp_detach(bp); |
| pci_set_drvdata(pdev, NULL); |
| out_disable: |
| pci_disable_device(pdev); |
| out_unregister: |
| devlink_free(devlink); |
| return err; |
| } |
| |
| static void |
| ptp_ocp_remove(struct pci_dev *pdev) |
| { |
| struct ptp_ocp *bp = pci_get_drvdata(pdev); |
| struct devlink *devlink = priv_to_devlink(bp); |
| |
| devlink_unregister(devlink); |
| ptp_ocp_detach(bp); |
| pci_set_drvdata(pdev, NULL); |
| pci_disable_device(pdev); |
| |
| devlink_free(devlink); |
| } |
| |
| static struct pci_driver ptp_ocp_driver = { |
| .name = KBUILD_MODNAME, |
| .id_table = ptp_ocp_pcidev_id, |
| .probe = ptp_ocp_probe, |
| .remove = ptp_ocp_remove, |
| }; |
| |
| static int |
| ptp_ocp_i2c_notifier_call(struct notifier_block *nb, |
| unsigned long action, void *data) |
| { |
| struct device *dev, *child = data; |
| struct ptp_ocp *bp; |
| bool add; |
| |
| switch (action) { |
| case BUS_NOTIFY_ADD_DEVICE: |
| case BUS_NOTIFY_DEL_DEVICE: |
| add = action == BUS_NOTIFY_ADD_DEVICE; |
| break; |
| default: |
| return 0; |
| } |
| |
| if (!i2c_verify_adapter(child)) |
| return 0; |
| |
| dev = child; |
| while ((dev = dev->parent)) |
| if (dev->driver && !strcmp(dev->driver->name, KBUILD_MODNAME)) |
| goto found; |
| return 0; |
| |
| found: |
| bp = dev_get_drvdata(dev); |
| if (add) |
| ptp_ocp_symlink(bp, child, "i2c"); |
| else |
| sysfs_remove_link(&bp->dev.kobj, "i2c"); |
| |
| return 0; |
| } |
| |
| static struct notifier_block ptp_ocp_i2c_notifier = { |
| .notifier_call = ptp_ocp_i2c_notifier_call, |
| }; |
| |
| static int __init |
| ptp_ocp_init(void) |
| { |
| const char *what; |
| int err; |
| |
| ptp_ocp_debugfs_init(); |
| |
| what = "timecard class"; |
| err = class_register(&timecard_class); |
| if (err) |
| goto out; |
| |
| what = "i2c notifier"; |
| err = bus_register_notifier(&i2c_bus_type, &ptp_ocp_i2c_notifier); |
| if (err) |
| goto out_notifier; |
| |
| what = "ptp_ocp driver"; |
| err = pci_register_driver(&ptp_ocp_driver); |
| if (err) |
| goto out_register; |
| |
| return 0; |
| |
| out_register: |
| bus_unregister_notifier(&i2c_bus_type, &ptp_ocp_i2c_notifier); |
| out_notifier: |
| class_unregister(&timecard_class); |
| out: |
| ptp_ocp_debugfs_fini(); |
| pr_err(KBUILD_MODNAME ": failed to register %s: %d\n", what, err); |
| return err; |
| } |
| |
| static void __exit |
| ptp_ocp_fini(void) |
| { |
| bus_unregister_notifier(&i2c_bus_type, &ptp_ocp_i2c_notifier); |
| pci_unregister_driver(&ptp_ocp_driver); |
| class_unregister(&timecard_class); |
| ptp_ocp_debugfs_fini(); |
| } |
| |
| module_init(ptp_ocp_init); |
| module_exit(ptp_ocp_fini); |
| |
| MODULE_DESCRIPTION("OpenCompute TimeCard driver"); |
| MODULE_LICENSE("GPL v2"); |