| /* |
| * GPMC support functions |
| * |
| * Copyright (C) 2005-2006 Nokia Corporation |
| * |
| * Author: Juha Yrjola |
| * |
| * Copyright (C) 2009 Texas Instruments |
| * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #undef DEBUG |
| |
| #include <linux/irq.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/err.h> |
| #include <linux/clk.h> |
| #include <linux/ioport.h> |
| #include <linux/spinlock.h> |
| #include <linux/io.h> |
| #include <linux/module.h> |
| #include <linux/interrupt.h> |
| #include <linux/platform_device.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/of_mtd.h> |
| #include <linux/of_device.h> |
| #include <linux/mtd/nand.h> |
| #include <linux/pm_runtime.h> |
| |
| #include <linux/platform_data/mtd-nand-omap2.h> |
| |
| #include <asm/mach-types.h> |
| |
| #include "soc.h" |
| #include "common.h" |
| #include "omap_device.h" |
| #include "gpmc.h" |
| #include "gpmc-nand.h" |
| #include "gpmc-onenand.h" |
| |
| #define DEVICE_NAME "omap-gpmc" |
| |
| /* GPMC register offsets */ |
| #define GPMC_REVISION 0x00 |
| #define GPMC_SYSCONFIG 0x10 |
| #define GPMC_SYSSTATUS 0x14 |
| #define GPMC_IRQSTATUS 0x18 |
| #define GPMC_IRQENABLE 0x1c |
| #define GPMC_TIMEOUT_CONTROL 0x40 |
| #define GPMC_ERR_ADDRESS 0x44 |
| #define GPMC_ERR_TYPE 0x48 |
| #define GPMC_CONFIG 0x50 |
| #define GPMC_STATUS 0x54 |
| #define GPMC_PREFETCH_CONFIG1 0x1e0 |
| #define GPMC_PREFETCH_CONFIG2 0x1e4 |
| #define GPMC_PREFETCH_CONTROL 0x1ec |
| #define GPMC_PREFETCH_STATUS 0x1f0 |
| #define GPMC_ECC_CONFIG 0x1f4 |
| #define GPMC_ECC_CONTROL 0x1f8 |
| #define GPMC_ECC_SIZE_CONFIG 0x1fc |
| #define GPMC_ECC1_RESULT 0x200 |
| #define GPMC_ECC_BCH_RESULT_0 0x240 /* not available on OMAP2 */ |
| #define GPMC_ECC_BCH_RESULT_1 0x244 /* not available on OMAP2 */ |
| #define GPMC_ECC_BCH_RESULT_2 0x248 /* not available on OMAP2 */ |
| #define GPMC_ECC_BCH_RESULT_3 0x24c /* not available on OMAP2 */ |
| |
| /* GPMC ECC control settings */ |
| #define GPMC_ECC_CTRL_ECCCLEAR 0x100 |
| #define GPMC_ECC_CTRL_ECCDISABLE 0x000 |
| #define GPMC_ECC_CTRL_ECCREG1 0x001 |
| #define GPMC_ECC_CTRL_ECCREG2 0x002 |
| #define GPMC_ECC_CTRL_ECCREG3 0x003 |
| #define GPMC_ECC_CTRL_ECCREG4 0x004 |
| #define GPMC_ECC_CTRL_ECCREG5 0x005 |
| #define GPMC_ECC_CTRL_ECCREG6 0x006 |
| #define GPMC_ECC_CTRL_ECCREG7 0x007 |
| #define GPMC_ECC_CTRL_ECCREG8 0x008 |
| #define GPMC_ECC_CTRL_ECCREG9 0x009 |
| |
| #define GPMC_CONFIG2_CSEXTRADELAY BIT(7) |
| #define GPMC_CONFIG3_ADVEXTRADELAY BIT(7) |
| #define GPMC_CONFIG4_OEEXTRADELAY BIT(7) |
| #define GPMC_CONFIG4_WEEXTRADELAY BIT(23) |
| #define GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN BIT(6) |
| #define GPMC_CONFIG6_CYCLE2CYCLESAMECSEN BIT(7) |
| |
| #define GPMC_CS0_OFFSET 0x60 |
| #define GPMC_CS_SIZE 0x30 |
| #define GPMC_BCH_SIZE 0x10 |
| |
| #define GPMC_MEM_END 0x3FFFFFFF |
| |
| #define GPMC_CHUNK_SHIFT 24 /* 16 MB */ |
| #define GPMC_SECTION_SHIFT 28 /* 128 MB */ |
| |
| #define CS_NUM_SHIFT 24 |
| #define ENABLE_PREFETCH (0x1 << 7) |
| #define DMA_MPU_MODE 2 |
| |
| #define GPMC_REVISION_MAJOR(l) ((l >> 4) & 0xf) |
| #define GPMC_REVISION_MINOR(l) (l & 0xf) |
| |
| #define GPMC_HAS_WR_ACCESS 0x1 |
| #define GPMC_HAS_WR_DATA_MUX_BUS 0x2 |
| #define GPMC_HAS_MUX_AAD 0x4 |
| |
| #define GPMC_NR_WAITPINS 4 |
| |
| /* XXX: Only NAND irq has been considered,currently these are the only ones used |
| */ |
| #define GPMC_NR_IRQ 2 |
| |
| struct gpmc_client_irq { |
| unsigned irq; |
| u32 bitmask; |
| }; |
| |
| /* Structure to save gpmc cs context */ |
| struct gpmc_cs_config { |
| u32 config1; |
| u32 config2; |
| u32 config3; |
| u32 config4; |
| u32 config5; |
| u32 config6; |
| u32 config7; |
| int is_valid; |
| }; |
| |
| /* |
| * Structure to save/restore gpmc context |
| * to support core off on OMAP3 |
| */ |
| struct omap3_gpmc_regs { |
| u32 sysconfig; |
| u32 irqenable; |
| u32 timeout_ctrl; |
| u32 config; |
| u32 prefetch_config1; |
| u32 prefetch_config2; |
| u32 prefetch_control; |
| struct gpmc_cs_config cs_context[GPMC_CS_NUM]; |
| }; |
| |
| static struct gpmc_client_irq gpmc_client_irq[GPMC_NR_IRQ]; |
| static struct irq_chip gpmc_irq_chip; |
| static int gpmc_irq_start; |
| |
| static struct resource gpmc_mem_root; |
| static struct resource gpmc_cs_mem[GPMC_CS_NUM]; |
| static DEFINE_SPINLOCK(gpmc_mem_lock); |
| /* Define chip-selects as reserved by default until probe completes */ |
| static unsigned int gpmc_cs_map = ((1 << GPMC_CS_NUM) - 1); |
| static unsigned int gpmc_cs_num = GPMC_CS_NUM; |
| static unsigned int gpmc_nr_waitpins; |
| static struct device *gpmc_dev; |
| static int gpmc_irq; |
| static resource_size_t phys_base, mem_size; |
| static unsigned gpmc_capability; |
| static void __iomem *gpmc_base; |
| |
| static struct clk *gpmc_l3_clk; |
| |
| static irqreturn_t gpmc_handle_irq(int irq, void *dev); |
| |
| static void gpmc_write_reg(int idx, u32 val) |
| { |
| writel_relaxed(val, gpmc_base + idx); |
| } |
| |
| static u32 gpmc_read_reg(int idx) |
| { |
| return readl_relaxed(gpmc_base + idx); |
| } |
| |
| void gpmc_cs_write_reg(int cs, int idx, u32 val) |
| { |
| void __iomem *reg_addr; |
| |
| reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx; |
| writel_relaxed(val, reg_addr); |
| } |
| |
| static u32 gpmc_cs_read_reg(int cs, int idx) |
| { |
| void __iomem *reg_addr; |
| |
| reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx; |
| return readl_relaxed(reg_addr); |
| } |
| |
| /* TODO: Add support for gpmc_fck to clock framework and use it */ |
| static unsigned long gpmc_get_fclk_period(void) |
| { |
| unsigned long rate = clk_get_rate(gpmc_l3_clk); |
| |
| if (rate == 0) { |
| printk(KERN_WARNING "gpmc_l3_clk not enabled\n"); |
| return 0; |
| } |
| |
| rate /= 1000; |
| rate = 1000000000 / rate; /* In picoseconds */ |
| |
| return rate; |
| } |
| |
| static unsigned int gpmc_ns_to_ticks(unsigned int time_ns) |
| { |
| unsigned long tick_ps; |
| |
| /* Calculate in picosecs to yield more exact results */ |
| tick_ps = gpmc_get_fclk_period(); |
| |
| return (time_ns * 1000 + tick_ps - 1) / tick_ps; |
| } |
| |
| static unsigned int gpmc_ps_to_ticks(unsigned int time_ps) |
| { |
| unsigned long tick_ps; |
| |
| /* Calculate in picosecs to yield more exact results */ |
| tick_ps = gpmc_get_fclk_period(); |
| |
| return (time_ps + tick_ps - 1) / tick_ps; |
| } |
| |
| unsigned int gpmc_ticks_to_ns(unsigned int ticks) |
| { |
| return ticks * gpmc_get_fclk_period() / 1000; |
| } |
| |
| static unsigned int gpmc_ticks_to_ps(unsigned int ticks) |
| { |
| return ticks * gpmc_get_fclk_period(); |
| } |
| |
| static unsigned int gpmc_round_ps_to_ticks(unsigned int time_ps) |
| { |
| unsigned long ticks = gpmc_ps_to_ticks(time_ps); |
| |
| return ticks * gpmc_get_fclk_period(); |
| } |
| |
| static inline void gpmc_cs_modify_reg(int cs, int reg, u32 mask, bool value) |
| { |
| u32 l; |
| |
| l = gpmc_cs_read_reg(cs, reg); |
| if (value) |
| l |= mask; |
| else |
| l &= ~mask; |
| gpmc_cs_write_reg(cs, reg, l); |
| } |
| |
| static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p) |
| { |
| gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG1, |
| GPMC_CONFIG1_TIME_PARA_GRAN, |
| p->time_para_granularity); |
| gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG2, |
| GPMC_CONFIG2_CSEXTRADELAY, p->cs_extra_delay); |
| gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG3, |
| GPMC_CONFIG3_ADVEXTRADELAY, p->adv_extra_delay); |
| gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4, |
| GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay); |
| gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4, |
| GPMC_CONFIG4_OEEXTRADELAY, p->we_extra_delay); |
| gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6, |
| GPMC_CONFIG6_CYCLE2CYCLESAMECSEN, |
| p->cycle2cyclesamecsen); |
| gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6, |
| GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN, |
| p->cycle2cyclediffcsen); |
| } |
| |
| #ifdef DEBUG |
| static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit, |
| int time, const char *name) |
| #else |
| static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit, |
| int time) |
| #endif |
| { |
| u32 l; |
| int ticks, mask, nr_bits; |
| |
| if (time == 0) |
| ticks = 0; |
| else |
| ticks = gpmc_ns_to_ticks(time); |
| nr_bits = end_bit - st_bit + 1; |
| if (ticks >= 1 << nr_bits) { |
| #ifdef DEBUG |
| printk(KERN_INFO "GPMC CS%d: %-10s* %3d ns, %3d ticks >= %d\n", |
| cs, name, time, ticks, 1 << nr_bits); |
| #endif |
| return -1; |
| } |
| |
| mask = (1 << nr_bits) - 1; |
| l = gpmc_cs_read_reg(cs, reg); |
| #ifdef DEBUG |
| printk(KERN_INFO |
| "GPMC CS%d: %-10s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n", |
| cs, name, ticks, gpmc_get_fclk_period() * ticks / 1000, |
| (l >> st_bit) & mask, time); |
| #endif |
| l &= ~(mask << st_bit); |
| l |= ticks << st_bit; |
| gpmc_cs_write_reg(cs, reg, l); |
| |
| return 0; |
| } |
| |
| #ifdef DEBUG |
| #define GPMC_SET_ONE(reg, st, end, field) \ |
| if (set_gpmc_timing_reg(cs, (reg), (st), (end), \ |
| t->field, #field) < 0) \ |
| return -1 |
| #else |
| #define GPMC_SET_ONE(reg, st, end, field) \ |
| if (set_gpmc_timing_reg(cs, (reg), (st), (end), t->field) < 0) \ |
| return -1 |
| #endif |
| |
| int gpmc_calc_divider(unsigned int sync_clk) |
| { |
| int div; |
| u32 l; |
| |
| l = sync_clk + (gpmc_get_fclk_period() - 1); |
| div = l / gpmc_get_fclk_period(); |
| if (div > 4) |
| return -1; |
| if (div <= 0) |
| div = 1; |
| |
| return div; |
| } |
| |
| int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t) |
| { |
| int div; |
| u32 l; |
| |
| div = gpmc_calc_divider(t->sync_clk); |
| if (div < 0) |
| return div; |
| |
| GPMC_SET_ONE(GPMC_CS_CONFIG2, 0, 3, cs_on); |
| GPMC_SET_ONE(GPMC_CS_CONFIG2, 8, 12, cs_rd_off); |
| GPMC_SET_ONE(GPMC_CS_CONFIG2, 16, 20, cs_wr_off); |
| |
| GPMC_SET_ONE(GPMC_CS_CONFIG3, 0, 3, adv_on); |
| GPMC_SET_ONE(GPMC_CS_CONFIG3, 8, 12, adv_rd_off); |
| GPMC_SET_ONE(GPMC_CS_CONFIG3, 16, 20, adv_wr_off); |
| |
| GPMC_SET_ONE(GPMC_CS_CONFIG4, 0, 3, oe_on); |
| GPMC_SET_ONE(GPMC_CS_CONFIG4, 8, 12, oe_off); |
| GPMC_SET_ONE(GPMC_CS_CONFIG4, 16, 19, we_on); |
| GPMC_SET_ONE(GPMC_CS_CONFIG4, 24, 28, we_off); |
| |
| GPMC_SET_ONE(GPMC_CS_CONFIG5, 0, 4, rd_cycle); |
| GPMC_SET_ONE(GPMC_CS_CONFIG5, 8, 12, wr_cycle); |
| GPMC_SET_ONE(GPMC_CS_CONFIG5, 16, 20, access); |
| |
| GPMC_SET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access); |
| |
| GPMC_SET_ONE(GPMC_CS_CONFIG6, 0, 3, bus_turnaround); |
| GPMC_SET_ONE(GPMC_CS_CONFIG6, 8, 11, cycle2cycle_delay); |
| |
| GPMC_SET_ONE(GPMC_CS_CONFIG1, 18, 19, wait_monitoring); |
| GPMC_SET_ONE(GPMC_CS_CONFIG1, 25, 26, clk_activation); |
| |
| if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) |
| GPMC_SET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus); |
| if (gpmc_capability & GPMC_HAS_WR_ACCESS) |
| GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access); |
| |
| /* caller is expected to have initialized CONFIG1 to cover |
| * at least sync vs async |
| */ |
| l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1); |
| if (l & (GPMC_CONFIG1_READTYPE_SYNC | GPMC_CONFIG1_WRITETYPE_SYNC)) { |
| #ifdef DEBUG |
| printk(KERN_INFO "GPMC CS%d CLK period is %lu ns (div %d)\n", |
| cs, (div * gpmc_get_fclk_period()) / 1000, div); |
| #endif |
| l &= ~0x03; |
| l |= (div - 1); |
| gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l); |
| } |
| |
| gpmc_cs_bool_timings(cs, &t->bool_timings); |
| |
| return 0; |
| } |
| |
| static int gpmc_cs_enable_mem(int cs, u32 base, u32 size) |
| { |
| u32 l; |
| u32 mask; |
| |
| /* |
| * Ensure that base address is aligned on a |
| * boundary equal to or greater than size. |
| */ |
| if (base & (size - 1)) |
| return -EINVAL; |
| |
| mask = (1 << GPMC_SECTION_SHIFT) - size; |
| l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); |
| l &= ~0x3f; |
| l = (base >> GPMC_CHUNK_SHIFT) & 0x3f; |
| l &= ~(0x0f << 8); |
| l |= ((mask >> GPMC_CHUNK_SHIFT) & 0x0f) << 8; |
| l |= GPMC_CONFIG7_CSVALID; |
| gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); |
| |
| return 0; |
| } |
| |
| static void gpmc_cs_disable_mem(int cs) |
| { |
| u32 l; |
| |
| l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); |
| l &= ~GPMC_CONFIG7_CSVALID; |
| gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); |
| } |
| |
| static void gpmc_cs_get_memconf(int cs, u32 *base, u32 *size) |
| { |
| u32 l; |
| u32 mask; |
| |
| l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); |
| *base = (l & 0x3f) << GPMC_CHUNK_SHIFT; |
| mask = (l >> 8) & 0x0f; |
| *size = (1 << GPMC_SECTION_SHIFT) - (mask << GPMC_CHUNK_SHIFT); |
| } |
| |
| static int gpmc_cs_mem_enabled(int cs) |
| { |
| u32 l; |
| |
| l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); |
| return l & GPMC_CONFIG7_CSVALID; |
| } |
| |
| static void gpmc_cs_set_reserved(int cs, int reserved) |
| { |
| gpmc_cs_map &= ~(1 << cs); |
| gpmc_cs_map |= (reserved ? 1 : 0) << cs; |
| } |
| |
| static bool gpmc_cs_reserved(int cs) |
| { |
| return gpmc_cs_map & (1 << cs); |
| } |
| |
| static unsigned long gpmc_mem_align(unsigned long size) |
| { |
| int order; |
| |
| size = (size - 1) >> (GPMC_CHUNK_SHIFT - 1); |
| order = GPMC_CHUNK_SHIFT - 1; |
| do { |
| size >>= 1; |
| order++; |
| } while (size); |
| size = 1 << order; |
| return size; |
| } |
| |
| static int gpmc_cs_insert_mem(int cs, unsigned long base, unsigned long size) |
| { |
| struct resource *res = &gpmc_cs_mem[cs]; |
| int r; |
| |
| size = gpmc_mem_align(size); |
| spin_lock(&gpmc_mem_lock); |
| res->start = base; |
| res->end = base + size - 1; |
| r = request_resource(&gpmc_mem_root, res); |
| spin_unlock(&gpmc_mem_lock); |
| |
| return r; |
| } |
| |
| static int gpmc_cs_delete_mem(int cs) |
| { |
| struct resource *res = &gpmc_cs_mem[cs]; |
| int r; |
| |
| spin_lock(&gpmc_mem_lock); |
| r = release_resource(res); |
| res->start = 0; |
| res->end = 0; |
| spin_unlock(&gpmc_mem_lock); |
| |
| return r; |
| } |
| |
| /** |
| * gpmc_cs_remap - remaps a chip-select physical base address |
| * @cs: chip-select to remap |
| * @base: physical base address to re-map chip-select to |
| * |
| * Re-maps a chip-select to a new physical base address specified by |
| * "base". Returns 0 on success and appropriate negative error code |
| * on failure. |
| */ |
| static int gpmc_cs_remap(int cs, u32 base) |
| { |
| int ret; |
| u32 old_base, size; |
| |
| if (cs > gpmc_cs_num) { |
| pr_err("%s: requested chip-select is disabled\n", __func__); |
| return -ENODEV; |
| } |
| |
| /* |
| * Make sure we ignore any device offsets from the GPMC partition |
| * allocated for the chip select and that the new base confirms |
| * to the GPMC 16MB minimum granularity. |
| */ |
| base &= ~(SZ_16M - 1); |
| |
| gpmc_cs_get_memconf(cs, &old_base, &size); |
| if (base == old_base) |
| return 0; |
| gpmc_cs_disable_mem(cs); |
| ret = gpmc_cs_delete_mem(cs); |
| if (ret < 0) |
| return ret; |
| ret = gpmc_cs_insert_mem(cs, base, size); |
| if (ret < 0) |
| return ret; |
| ret = gpmc_cs_enable_mem(cs, base, size); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| int gpmc_cs_request(int cs, unsigned long size, unsigned long *base) |
| { |
| struct resource *res = &gpmc_cs_mem[cs]; |
| int r = -1; |
| |
| if (cs > gpmc_cs_num) { |
| pr_err("%s: requested chip-select is disabled\n", __func__); |
| return -ENODEV; |
| } |
| size = gpmc_mem_align(size); |
| if (size > (1 << GPMC_SECTION_SHIFT)) |
| return -ENOMEM; |
| |
| spin_lock(&gpmc_mem_lock); |
| if (gpmc_cs_reserved(cs)) { |
| r = -EBUSY; |
| goto out; |
| } |
| if (gpmc_cs_mem_enabled(cs)) |
| r = adjust_resource(res, res->start & ~(size - 1), size); |
| if (r < 0) |
| r = allocate_resource(&gpmc_mem_root, res, size, 0, ~0, |
| size, NULL, NULL); |
| if (r < 0) |
| goto out; |
| |
| r = gpmc_cs_enable_mem(cs, res->start, resource_size(res)); |
| if (r < 0) { |
| release_resource(res); |
| goto out; |
| } |
| |
| *base = res->start; |
| gpmc_cs_set_reserved(cs, 1); |
| out: |
| spin_unlock(&gpmc_mem_lock); |
| return r; |
| } |
| EXPORT_SYMBOL(gpmc_cs_request); |
| |
| void gpmc_cs_free(int cs) |
| { |
| struct resource *res = &gpmc_cs_mem[cs]; |
| |
| spin_lock(&gpmc_mem_lock); |
| if (cs >= gpmc_cs_num || cs < 0 || !gpmc_cs_reserved(cs)) { |
| printk(KERN_ERR "Trying to free non-reserved GPMC CS%d\n", cs); |
| BUG(); |
| spin_unlock(&gpmc_mem_lock); |
| return; |
| } |
| gpmc_cs_disable_mem(cs); |
| if (res->flags) |
| release_resource(res); |
| gpmc_cs_set_reserved(cs, 0); |
| spin_unlock(&gpmc_mem_lock); |
| } |
| EXPORT_SYMBOL(gpmc_cs_free); |
| |
| /** |
| * gpmc_configure - write request to configure gpmc |
| * @cmd: command type |
| * @wval: value to write |
| * @return status of the operation |
| */ |
| int gpmc_configure(int cmd, int wval) |
| { |
| u32 regval; |
| |
| switch (cmd) { |
| case GPMC_ENABLE_IRQ: |
| gpmc_write_reg(GPMC_IRQENABLE, wval); |
| break; |
| |
| case GPMC_SET_IRQ_STATUS: |
| gpmc_write_reg(GPMC_IRQSTATUS, wval); |
| break; |
| |
| case GPMC_CONFIG_WP: |
| regval = gpmc_read_reg(GPMC_CONFIG); |
| if (wval) |
| regval &= ~GPMC_CONFIG_WRITEPROTECT; /* WP is ON */ |
| else |
| regval |= GPMC_CONFIG_WRITEPROTECT; /* WP is OFF */ |
| gpmc_write_reg(GPMC_CONFIG, regval); |
| break; |
| |
| default: |
| pr_err("%s: command not supported\n", __func__); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(gpmc_configure); |
| |
| void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs) |
| { |
| int i; |
| |
| reg->gpmc_status = gpmc_base + GPMC_STATUS; |
| reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET + |
| GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs; |
| reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET + |
| GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs; |
| reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET + |
| GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs; |
| reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1; |
| reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2; |
| reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL; |
| reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS; |
| reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG; |
| reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL; |
| reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG; |
| reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT; |
| |
| for (i = 0; i < GPMC_BCH_NUM_REMAINDER; i++) { |
| reg->gpmc_bch_result0[i] = gpmc_base + GPMC_ECC_BCH_RESULT_0 + |
| GPMC_BCH_SIZE * i; |
| reg->gpmc_bch_result1[i] = gpmc_base + GPMC_ECC_BCH_RESULT_1 + |
| GPMC_BCH_SIZE * i; |
| reg->gpmc_bch_result2[i] = gpmc_base + GPMC_ECC_BCH_RESULT_2 + |
| GPMC_BCH_SIZE * i; |
| reg->gpmc_bch_result3[i] = gpmc_base + GPMC_ECC_BCH_RESULT_3 + |
| GPMC_BCH_SIZE * i; |
| } |
| } |
| |
| int gpmc_get_client_irq(unsigned irq_config) |
| { |
| int i; |
| |
| if (hweight32(irq_config) > 1) |
| return 0; |
| |
| for (i = 0; i < GPMC_NR_IRQ; i++) |
| if (gpmc_client_irq[i].bitmask & irq_config) |
| return gpmc_client_irq[i].irq; |
| |
| return 0; |
| } |
| |
| static int gpmc_irq_endis(unsigned irq, bool endis) |
| { |
| int i; |
| u32 regval; |
| |
| for (i = 0; i < GPMC_NR_IRQ; i++) |
| if (irq == gpmc_client_irq[i].irq) { |
| regval = gpmc_read_reg(GPMC_IRQENABLE); |
| if (endis) |
| regval |= gpmc_client_irq[i].bitmask; |
| else |
| regval &= ~gpmc_client_irq[i].bitmask; |
| gpmc_write_reg(GPMC_IRQENABLE, regval); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static void gpmc_irq_disable(struct irq_data *p) |
| { |
| gpmc_irq_endis(p->irq, false); |
| } |
| |
| static void gpmc_irq_enable(struct irq_data *p) |
| { |
| gpmc_irq_endis(p->irq, true); |
| } |
| |
| static void gpmc_irq_noop(struct irq_data *data) { } |
| |
| static unsigned int gpmc_irq_noop_ret(struct irq_data *data) { return 0; } |
| |
| static int gpmc_setup_irq(void) |
| { |
| int i; |
| u32 regval; |
| |
| if (!gpmc_irq) |
| return -EINVAL; |
| |
| gpmc_irq_start = irq_alloc_descs(-1, 0, GPMC_NR_IRQ, 0); |
| if (gpmc_irq_start < 0) { |
| pr_err("irq_alloc_descs failed\n"); |
| return gpmc_irq_start; |
| } |
| |
| gpmc_irq_chip.name = "gpmc"; |
| gpmc_irq_chip.irq_startup = gpmc_irq_noop_ret; |
| gpmc_irq_chip.irq_enable = gpmc_irq_enable; |
| gpmc_irq_chip.irq_disable = gpmc_irq_disable; |
| gpmc_irq_chip.irq_shutdown = gpmc_irq_noop; |
| gpmc_irq_chip.irq_ack = gpmc_irq_noop; |
| gpmc_irq_chip.irq_mask = gpmc_irq_noop; |
| gpmc_irq_chip.irq_unmask = gpmc_irq_noop; |
| |
| gpmc_client_irq[0].bitmask = GPMC_IRQ_FIFOEVENTENABLE; |
| gpmc_client_irq[1].bitmask = GPMC_IRQ_COUNT_EVENT; |
| |
| for (i = 0; i < GPMC_NR_IRQ; i++) { |
| gpmc_client_irq[i].irq = gpmc_irq_start + i; |
| irq_set_chip_and_handler(gpmc_client_irq[i].irq, |
| &gpmc_irq_chip, handle_simple_irq); |
| set_irq_flags(gpmc_client_irq[i].irq, |
| IRQF_VALID | IRQF_NOAUTOEN); |
| } |
| |
| /* Disable interrupts */ |
| gpmc_write_reg(GPMC_IRQENABLE, 0); |
| |
| /* clear interrupts */ |
| regval = gpmc_read_reg(GPMC_IRQSTATUS); |
| gpmc_write_reg(GPMC_IRQSTATUS, regval); |
| |
| return request_irq(gpmc_irq, gpmc_handle_irq, 0, "gpmc", NULL); |
| } |
| |
| static int gpmc_free_irq(void) |
| { |
| int i; |
| |
| if (gpmc_irq) |
| free_irq(gpmc_irq, NULL); |
| |
| for (i = 0; i < GPMC_NR_IRQ; i++) { |
| irq_set_handler(gpmc_client_irq[i].irq, NULL); |
| irq_set_chip(gpmc_client_irq[i].irq, &no_irq_chip); |
| irq_modify_status(gpmc_client_irq[i].irq, 0, 0); |
| } |
| |
| irq_free_descs(gpmc_irq_start, GPMC_NR_IRQ); |
| |
| return 0; |
| } |
| |
| static void gpmc_mem_exit(void) |
| { |
| int cs; |
| |
| for (cs = 0; cs < gpmc_cs_num; cs++) { |
| if (!gpmc_cs_mem_enabled(cs)) |
| continue; |
| gpmc_cs_delete_mem(cs); |
| } |
| |
| } |
| |
| static void gpmc_mem_init(void) |
| { |
| int cs; |
| |
| /* |
| * The first 1MB of GPMC address space is typically mapped to |
| * the internal ROM. Never allocate the first page, to |
| * facilitate bug detection; even if we didn't boot from ROM. |
| */ |
| gpmc_mem_root.start = SZ_1M; |
| gpmc_mem_root.end = GPMC_MEM_END; |
| |
| /* Reserve all regions that has been set up by bootloader */ |
| for (cs = 0; cs < gpmc_cs_num; cs++) { |
| u32 base, size; |
| |
| if (!gpmc_cs_mem_enabled(cs)) |
| continue; |
| gpmc_cs_get_memconf(cs, &base, &size); |
| if (gpmc_cs_insert_mem(cs, base, size)) { |
| pr_warn("%s: disabling cs %d mapped at 0x%x-0x%x\n", |
| __func__, cs, base, base + size); |
| gpmc_cs_disable_mem(cs); |
| } |
| } |
| } |
| |
| static u32 gpmc_round_ps_to_sync_clk(u32 time_ps, u32 sync_clk) |
| { |
| u32 temp; |
| int div; |
| |
| div = gpmc_calc_divider(sync_clk); |
| temp = gpmc_ps_to_ticks(time_ps); |
| temp = (temp + div - 1) / div; |
| return gpmc_ticks_to_ps(temp * div); |
| } |
| |
| /* XXX: can the cycles be avoided ? */ |
| static int gpmc_calc_sync_read_timings(struct gpmc_timings *gpmc_t, |
| struct gpmc_device_timings *dev_t, |
| bool mux) |
| { |
| u32 temp; |
| |
| /* adv_rd_off */ |
| temp = dev_t->t_avdp_r; |
| /* XXX: mux check required ? */ |
| if (mux) { |
| /* XXX: t_avdp not to be required for sync, only added for tusb |
| * this indirectly necessitates requirement of t_avdp_r and |
| * t_avdp_w instead of having a single t_avdp |
| */ |
| temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_avdh); |
| temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); |
| } |
| gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp); |
| |
| /* oe_on */ |
| temp = dev_t->t_oeasu; /* XXX: remove this ? */ |
| if (mux) { |
| temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_ach); |
| temp = max_t(u32, temp, gpmc_t->adv_rd_off + |
| gpmc_ticks_to_ps(dev_t->cyc_aavdh_oe)); |
| } |
| gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp); |
| |
| /* access */ |
| /* XXX: any scope for improvement ?, by combining oe_on |
| * and clk_activation, need to check whether |
| * access = clk_activation + round to sync clk ? |
| */ |
| temp = max_t(u32, dev_t->t_iaa, dev_t->cyc_iaa * gpmc_t->sync_clk); |
| temp += gpmc_t->clk_activation; |
| if (dev_t->cyc_oe) |
| temp = max_t(u32, temp, gpmc_t->oe_on + |
| gpmc_ticks_to_ps(dev_t->cyc_oe)); |
| gpmc_t->access = gpmc_round_ps_to_ticks(temp); |
| |
| gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1); |
| gpmc_t->cs_rd_off = gpmc_t->oe_off; |
| |
| /* rd_cycle */ |
| temp = max_t(u32, dev_t->t_cez_r, dev_t->t_oez); |
| temp = gpmc_round_ps_to_sync_clk(temp, gpmc_t->sync_clk) + |
| gpmc_t->access; |
| /* XXX: barter t_ce_rdyz with t_cez_r ? */ |
| if (dev_t->t_ce_rdyz) |
| temp = max_t(u32, temp, gpmc_t->cs_rd_off + dev_t->t_ce_rdyz); |
| gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp); |
| |
| return 0; |
| } |
| |
| static int gpmc_calc_sync_write_timings(struct gpmc_timings *gpmc_t, |
| struct gpmc_device_timings *dev_t, |
| bool mux) |
| { |
| u32 temp; |
| |
| /* adv_wr_off */ |
| temp = dev_t->t_avdp_w; |
| if (mux) { |
| temp = max_t(u32, temp, |
| gpmc_t->clk_activation + dev_t->t_avdh); |
| temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); |
| } |
| gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp); |
| |
| /* wr_data_mux_bus */ |
| temp = max_t(u32, dev_t->t_weasu, |
| gpmc_t->clk_activation + dev_t->t_rdyo); |
| /* XXX: shouldn't mux be kept as a whole for wr_data_mux_bus ?, |
| * and in that case remember to handle we_on properly |
| */ |
| if (mux) { |
| temp = max_t(u32, temp, |
| gpmc_t->adv_wr_off + dev_t->t_aavdh); |
| temp = max_t(u32, temp, gpmc_t->adv_wr_off + |
| gpmc_ticks_to_ps(dev_t->cyc_aavdh_we)); |
| } |
| gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp); |
| |
| /* we_on */ |
| if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) |
| gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu); |
| else |
| gpmc_t->we_on = gpmc_t->wr_data_mux_bus; |
| |
| /* wr_access */ |
| /* XXX: gpmc_capability check reqd ? , even if not, will not harm */ |
| gpmc_t->wr_access = gpmc_t->access; |
| |
| /* we_off */ |
| temp = gpmc_t->we_on + dev_t->t_wpl; |
| temp = max_t(u32, temp, |
| gpmc_t->wr_access + gpmc_ticks_to_ps(1)); |
| temp = max_t(u32, temp, |
| gpmc_t->we_on + gpmc_ticks_to_ps(dev_t->cyc_wpl)); |
| gpmc_t->we_off = gpmc_round_ps_to_ticks(temp); |
| |
| gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off + |
| dev_t->t_wph); |
| |
| /* wr_cycle */ |
| temp = gpmc_round_ps_to_sync_clk(dev_t->t_cez_w, gpmc_t->sync_clk); |
| temp += gpmc_t->wr_access; |
| /* XXX: barter t_ce_rdyz with t_cez_w ? */ |
| if (dev_t->t_ce_rdyz) |
| temp = max_t(u32, temp, |
| gpmc_t->cs_wr_off + dev_t->t_ce_rdyz); |
| gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp); |
| |
| return 0; |
| } |
| |
| static int gpmc_calc_async_read_timings(struct gpmc_timings *gpmc_t, |
| struct gpmc_device_timings *dev_t, |
| bool mux) |
| { |
| u32 temp; |
| |
| /* adv_rd_off */ |
| temp = dev_t->t_avdp_r; |
| if (mux) |
| temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); |
| gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp); |
| |
| /* oe_on */ |
| temp = dev_t->t_oeasu; |
| if (mux) |
| temp = max_t(u32, temp, |
| gpmc_t->adv_rd_off + dev_t->t_aavdh); |
| gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp); |
| |
| /* access */ |
| temp = max_t(u32, dev_t->t_iaa, /* XXX: remove t_iaa in async ? */ |
| gpmc_t->oe_on + dev_t->t_oe); |
| temp = max_t(u32, temp, |
| gpmc_t->cs_on + dev_t->t_ce); |
| temp = max_t(u32, temp, |
| gpmc_t->adv_on + dev_t->t_aa); |
| gpmc_t->access = gpmc_round_ps_to_ticks(temp); |
| |
| gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1); |
| gpmc_t->cs_rd_off = gpmc_t->oe_off; |
| |
| /* rd_cycle */ |
| temp = max_t(u32, dev_t->t_rd_cycle, |
| gpmc_t->cs_rd_off + dev_t->t_cez_r); |
| temp = max_t(u32, temp, gpmc_t->oe_off + dev_t->t_oez); |
| gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp); |
| |
| return 0; |
| } |
| |
| static int gpmc_calc_async_write_timings(struct gpmc_timings *gpmc_t, |
| struct gpmc_device_timings *dev_t, |
| bool mux) |
| { |
| u32 temp; |
| |
| /* adv_wr_off */ |
| temp = dev_t->t_avdp_w; |
| if (mux) |
| temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); |
| gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp); |
| |
| /* wr_data_mux_bus */ |
| temp = dev_t->t_weasu; |
| if (mux) { |
| temp = max_t(u32, temp, gpmc_t->adv_wr_off + dev_t->t_aavdh); |
| temp = max_t(u32, temp, gpmc_t->adv_wr_off + |
| gpmc_ticks_to_ps(dev_t->cyc_aavdh_we)); |
| } |
| gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp); |
| |
| /* we_on */ |
| if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) |
| gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu); |
| else |
| gpmc_t->we_on = gpmc_t->wr_data_mux_bus; |
| |
| /* we_off */ |
| temp = gpmc_t->we_on + dev_t->t_wpl; |
| gpmc_t->we_off = gpmc_round_ps_to_ticks(temp); |
| |
| gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off + |
| dev_t->t_wph); |
| |
| /* wr_cycle */ |
| temp = max_t(u32, dev_t->t_wr_cycle, |
| gpmc_t->cs_wr_off + dev_t->t_cez_w); |
| gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp); |
| |
| return 0; |
| } |
| |
| static int gpmc_calc_sync_common_timings(struct gpmc_timings *gpmc_t, |
| struct gpmc_device_timings *dev_t) |
| { |
| u32 temp; |
| |
| gpmc_t->sync_clk = gpmc_calc_divider(dev_t->clk) * |
| gpmc_get_fclk_period(); |
| |
| gpmc_t->page_burst_access = gpmc_round_ps_to_sync_clk( |
| dev_t->t_bacc, |
| gpmc_t->sync_clk); |
| |
| temp = max_t(u32, dev_t->t_ces, dev_t->t_avds); |
| gpmc_t->clk_activation = gpmc_round_ps_to_ticks(temp); |
| |
| if (gpmc_calc_divider(gpmc_t->sync_clk) != 1) |
| return 0; |
| |
| if (dev_t->ce_xdelay) |
| gpmc_t->bool_timings.cs_extra_delay = true; |
| if (dev_t->avd_xdelay) |
| gpmc_t->bool_timings.adv_extra_delay = true; |
| if (dev_t->oe_xdelay) |
| gpmc_t->bool_timings.oe_extra_delay = true; |
| if (dev_t->we_xdelay) |
| gpmc_t->bool_timings.we_extra_delay = true; |
| |
| return 0; |
| } |
| |
| static int gpmc_calc_common_timings(struct gpmc_timings *gpmc_t, |
| struct gpmc_device_timings *dev_t, |
| bool sync) |
| { |
| u32 temp; |
| |
| /* cs_on */ |
| gpmc_t->cs_on = gpmc_round_ps_to_ticks(dev_t->t_ceasu); |
| |
| /* adv_on */ |
| temp = dev_t->t_avdasu; |
| if (dev_t->t_ce_avd) |
| temp = max_t(u32, temp, |
| gpmc_t->cs_on + dev_t->t_ce_avd); |
| gpmc_t->adv_on = gpmc_round_ps_to_ticks(temp); |
| |
| if (sync) |
| gpmc_calc_sync_common_timings(gpmc_t, dev_t); |
| |
| return 0; |
| } |
| |
| /* TODO: remove this function once all peripherals are confirmed to |
| * work with generic timing. Simultaneously gpmc_cs_set_timings() |
| * has to be modified to handle timings in ps instead of ns |
| */ |
| static void gpmc_convert_ps_to_ns(struct gpmc_timings *t) |
| { |
| t->cs_on /= 1000; |
| t->cs_rd_off /= 1000; |
| t->cs_wr_off /= 1000; |
| t->adv_on /= 1000; |
| t->adv_rd_off /= 1000; |
| t->adv_wr_off /= 1000; |
| t->we_on /= 1000; |
| t->we_off /= 1000; |
| t->oe_on /= 1000; |
| t->oe_off /= 1000; |
| t->page_burst_access /= 1000; |
| t->access /= 1000; |
| t->rd_cycle /= 1000; |
| t->wr_cycle /= 1000; |
| t->bus_turnaround /= 1000; |
| t->cycle2cycle_delay /= 1000; |
| t->wait_monitoring /= 1000; |
| t->clk_activation /= 1000; |
| t->wr_access /= 1000; |
| t->wr_data_mux_bus /= 1000; |
| } |
| |
| int gpmc_calc_timings(struct gpmc_timings *gpmc_t, |
| struct gpmc_settings *gpmc_s, |
| struct gpmc_device_timings *dev_t) |
| { |
| bool mux = false, sync = false; |
| |
| if (gpmc_s) { |
| mux = gpmc_s->mux_add_data ? true : false; |
| sync = (gpmc_s->sync_read || gpmc_s->sync_write); |
| } |
| |
| memset(gpmc_t, 0, sizeof(*gpmc_t)); |
| |
| gpmc_calc_common_timings(gpmc_t, dev_t, sync); |
| |
| if (gpmc_s && gpmc_s->sync_read) |
| gpmc_calc_sync_read_timings(gpmc_t, dev_t, mux); |
| else |
| gpmc_calc_async_read_timings(gpmc_t, dev_t, mux); |
| |
| if (gpmc_s && gpmc_s->sync_write) |
| gpmc_calc_sync_write_timings(gpmc_t, dev_t, mux); |
| else |
| gpmc_calc_async_write_timings(gpmc_t, dev_t, mux); |
| |
| /* TODO: remove, see function definition */ |
| gpmc_convert_ps_to_ns(gpmc_t); |
| |
| return 0; |
| } |
| |
| /** |
| * gpmc_cs_program_settings - programs non-timing related settings |
| * @cs: GPMC chip-select to program |
| * @p: pointer to GPMC settings structure |
| * |
| * Programs non-timing related settings for a GPMC chip-select, such as |
| * bus-width, burst configuration, etc. Function should be called once |
| * for each chip-select that is being used and must be called before |
| * calling gpmc_cs_set_timings() as timing parameters in the CONFIG1 |
| * register will be initialised to zero by this function. Returns 0 on |
| * success and appropriate negative error code on failure. |
| */ |
| int gpmc_cs_program_settings(int cs, struct gpmc_settings *p) |
| { |
| u32 config1; |
| |
| if ((!p->device_width) || (p->device_width > GPMC_DEVWIDTH_16BIT)) { |
| pr_err("%s: invalid width %d!", __func__, p->device_width); |
| return -EINVAL; |
| } |
| |
| /* Address-data multiplexing not supported for NAND devices */ |
| if (p->device_nand && p->mux_add_data) { |
| pr_err("%s: invalid configuration!\n", __func__); |
| return -EINVAL; |
| } |
| |
| if ((p->mux_add_data > GPMC_MUX_AD) || |
| ((p->mux_add_data == GPMC_MUX_AAD) && |
| !(gpmc_capability & GPMC_HAS_MUX_AAD))) { |
| pr_err("%s: invalid multiplex configuration!\n", __func__); |
| return -EINVAL; |
| } |
| |
| /* Page/burst mode supports lengths of 4, 8 and 16 bytes */ |
| if (p->burst_read || p->burst_write) { |
| switch (p->burst_len) { |
| case GPMC_BURST_4: |
| case GPMC_BURST_8: |
| case GPMC_BURST_16: |
| break; |
| default: |
| pr_err("%s: invalid page/burst-length (%d)\n", |
| __func__, p->burst_len); |
| return -EINVAL; |
| } |
| } |
| |
| if ((p->wait_on_read || p->wait_on_write) && |
| (p->wait_pin > gpmc_nr_waitpins)) { |
| pr_err("%s: invalid wait-pin (%d)\n", __func__, p->wait_pin); |
| return -EINVAL; |
| } |
| |
| config1 = GPMC_CONFIG1_DEVICESIZE((p->device_width - 1)); |
| |
| if (p->sync_read) |
| config1 |= GPMC_CONFIG1_READTYPE_SYNC; |
| if (p->sync_write) |
| config1 |= GPMC_CONFIG1_WRITETYPE_SYNC; |
| if (p->wait_on_read) |
| config1 |= GPMC_CONFIG1_WAIT_READ_MON; |
| if (p->wait_on_write) |
| config1 |= GPMC_CONFIG1_WAIT_WRITE_MON; |
| if (p->wait_on_read || p->wait_on_write) |
| config1 |= GPMC_CONFIG1_WAIT_PIN_SEL(p->wait_pin); |
| if (p->device_nand) |
| config1 |= GPMC_CONFIG1_DEVICETYPE(GPMC_DEVICETYPE_NAND); |
| if (p->mux_add_data) |
| config1 |= GPMC_CONFIG1_MUXTYPE(p->mux_add_data); |
| if (p->burst_read) |
| config1 |= GPMC_CONFIG1_READMULTIPLE_SUPP; |
| if (p->burst_write) |
| config1 |= GPMC_CONFIG1_WRITEMULTIPLE_SUPP; |
| if (p->burst_read || p->burst_write) { |
| config1 |= GPMC_CONFIG1_PAGE_LEN(p->burst_len >> 3); |
| config1 |= p->burst_wrap ? GPMC_CONFIG1_WRAPBURST_SUPP : 0; |
| } |
| |
| gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, config1); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_OF |
| static struct of_device_id gpmc_dt_ids[] = { |
| { .compatible = "ti,omap2420-gpmc" }, |
| { .compatible = "ti,omap2430-gpmc" }, |
| { .compatible = "ti,omap3430-gpmc" }, /* omap3430 & omap3630 */ |
| { .compatible = "ti,omap4430-gpmc" }, /* omap4430 & omap4460 & omap543x */ |
| { .compatible = "ti,am3352-gpmc" }, /* am335x devices */ |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, gpmc_dt_ids); |
| |
| /** |
| * gpmc_read_settings_dt - read gpmc settings from device-tree |
| * @np: pointer to device-tree node for a gpmc child device |
| * @p: pointer to gpmc settings structure |
| * |
| * Reads the GPMC settings for a GPMC child device from device-tree and |
| * stores them in the GPMC settings structure passed. The GPMC settings |
| * structure is initialised to zero by this function and so any |
| * previously stored settings will be cleared. |
| */ |
| void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p) |
| { |
| memset(p, 0, sizeof(struct gpmc_settings)); |
| |
| p->sync_read = of_property_read_bool(np, "gpmc,sync-read"); |
| p->sync_write = of_property_read_bool(np, "gpmc,sync-write"); |
| of_property_read_u32(np, "gpmc,device-width", &p->device_width); |
| of_property_read_u32(np, "gpmc,mux-add-data", &p->mux_add_data); |
| |
| if (!of_property_read_u32(np, "gpmc,burst-length", &p->burst_len)) { |
| p->burst_wrap = of_property_read_bool(np, "gpmc,burst-wrap"); |
| p->burst_read = of_property_read_bool(np, "gpmc,burst-read"); |
| p->burst_write = of_property_read_bool(np, "gpmc,burst-write"); |
| if (!p->burst_read && !p->burst_write) |
| pr_warn("%s: page/burst-length set but not used!\n", |
| __func__); |
| } |
| |
| if (!of_property_read_u32(np, "gpmc,wait-pin", &p->wait_pin)) { |
| p->wait_on_read = of_property_read_bool(np, |
| "gpmc,wait-on-read"); |
| p->wait_on_write = of_property_read_bool(np, |
| "gpmc,wait-on-write"); |
| if (!p->wait_on_read && !p->wait_on_write) |
| pr_warn("%s: read/write wait monitoring not enabled!\n", |
| __func__); |
| } |
| } |
| |
| static void __maybe_unused gpmc_read_timings_dt(struct device_node *np, |
| struct gpmc_timings *gpmc_t) |
| { |
| struct gpmc_bool_timings *p; |
| |
| if (!np || !gpmc_t) |
| return; |
| |
| memset(gpmc_t, 0, sizeof(*gpmc_t)); |
| |
| /* minimum clock period for syncronous mode */ |
| of_property_read_u32(np, "gpmc,sync-clk-ps", &gpmc_t->sync_clk); |
| |
| /* chip select timtings */ |
| of_property_read_u32(np, "gpmc,cs-on-ns", &gpmc_t->cs_on); |
| of_property_read_u32(np, "gpmc,cs-rd-off-ns", &gpmc_t->cs_rd_off); |
| of_property_read_u32(np, "gpmc,cs-wr-off-ns", &gpmc_t->cs_wr_off); |
| |
| /* ADV signal timings */ |
| of_property_read_u32(np, "gpmc,adv-on-ns", &gpmc_t->adv_on); |
| of_property_read_u32(np, "gpmc,adv-rd-off-ns", &gpmc_t->adv_rd_off); |
| of_property_read_u32(np, "gpmc,adv-wr-off-ns", &gpmc_t->adv_wr_off); |
| |
| /* WE signal timings */ |
| of_property_read_u32(np, "gpmc,we-on-ns", &gpmc_t->we_on); |
| of_property_read_u32(np, "gpmc,we-off-ns", &gpmc_t->we_off); |
| |
| /* OE signal timings */ |
| of_property_read_u32(np, "gpmc,oe-on-ns", &gpmc_t->oe_on); |
| of_property_read_u32(np, "gpmc,oe-off-ns", &gpmc_t->oe_off); |
| |
| /* access and cycle timings */ |
| of_property_read_u32(np, "gpmc,page-burst-access-ns", |
| &gpmc_t->page_burst_access); |
| of_property_read_u32(np, "gpmc,access-ns", &gpmc_t->access); |
| of_property_read_u32(np, "gpmc,rd-cycle-ns", &gpmc_t->rd_cycle); |
| of_property_read_u32(np, "gpmc,wr-cycle-ns", &gpmc_t->wr_cycle); |
| of_property_read_u32(np, "gpmc,bus-turnaround-ns", |
| &gpmc_t->bus_turnaround); |
| of_property_read_u32(np, "gpmc,cycle2cycle-delay-ns", |
| &gpmc_t->cycle2cycle_delay); |
| of_property_read_u32(np, "gpmc,wait-monitoring-ns", |
| &gpmc_t->wait_monitoring); |
| of_property_read_u32(np, "gpmc,clk-activation-ns", |
| &gpmc_t->clk_activation); |
| |
| /* only applicable to OMAP3+ */ |
| of_property_read_u32(np, "gpmc,wr-access-ns", &gpmc_t->wr_access); |
| of_property_read_u32(np, "gpmc,wr-data-mux-bus-ns", |
| &gpmc_t->wr_data_mux_bus); |
| |
| /* bool timing parameters */ |
| p = &gpmc_t->bool_timings; |
| |
| p->cycle2cyclediffcsen = |
| of_property_read_bool(np, "gpmc,cycle2cycle-diffcsen"); |
| p->cycle2cyclesamecsen = |
| of_property_read_bool(np, "gpmc,cycle2cycle-samecsen"); |
| p->we_extra_delay = of_property_read_bool(np, "gpmc,we-extra-delay"); |
| p->oe_extra_delay = of_property_read_bool(np, "gpmc,oe-extra-delay"); |
| p->adv_extra_delay = of_property_read_bool(np, "gpmc,adv-extra-delay"); |
| p->cs_extra_delay = of_property_read_bool(np, "gpmc,cs-extra-delay"); |
| p->time_para_granularity = |
| of_property_read_bool(np, "gpmc,time-para-granularity"); |
| } |
| |
| #if IS_ENABLED(CONFIG_MTD_NAND) |
| |
| static const char * const nand_xfer_types[] = { |
| [NAND_OMAP_PREFETCH_POLLED] = "prefetch-polled", |
| [NAND_OMAP_POLLED] = "polled", |
| [NAND_OMAP_PREFETCH_DMA] = "prefetch-dma", |
| [NAND_OMAP_PREFETCH_IRQ] = "prefetch-irq", |
| }; |
| |
| static int gpmc_probe_nand_child(struct platform_device *pdev, |
| struct device_node *child) |
| { |
| u32 val; |
| const char *s; |
| struct gpmc_timings gpmc_t; |
| struct omap_nand_platform_data *gpmc_nand_data; |
| |
| if (of_property_read_u32(child, "reg", &val) < 0) { |
| dev_err(&pdev->dev, "%s has no 'reg' property\n", |
| child->full_name); |
| return -ENODEV; |
| } |
| |
| gpmc_nand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_nand_data), |
| GFP_KERNEL); |
| if (!gpmc_nand_data) |
| return -ENOMEM; |
| |
| gpmc_nand_data->cs = val; |
| gpmc_nand_data->of_node = child; |
| |
| /* Detect availability of ELM module */ |
| gpmc_nand_data->elm_of_node = of_parse_phandle(child, "ti,elm-id", 0); |
| if (gpmc_nand_data->elm_of_node == NULL) |
| gpmc_nand_data->elm_of_node = |
| of_parse_phandle(child, "elm_id", 0); |
| if (gpmc_nand_data->elm_of_node == NULL) |
| pr_warn("%s: ti,elm-id property not found\n", __func__); |
| |
| /* select ecc-scheme for NAND */ |
| if (of_property_read_string(child, "ti,nand-ecc-opt", &s)) { |
| pr_err("%s: ti,nand-ecc-opt not found\n", __func__); |
| return -ENODEV; |
| } |
| if (!strcmp(s, "ham1") || !strcmp(s, "sw") || |
| !strcmp(s, "hw") || !strcmp(s, "hw-romcode")) |
| gpmc_nand_data->ecc_opt = |
| OMAP_ECC_HAM1_CODE_HW; |
| else if (!strcmp(s, "bch4")) |
| if (gpmc_nand_data->elm_of_node) |
| gpmc_nand_data->ecc_opt = |
| OMAP_ECC_BCH4_CODE_HW; |
| else |
| gpmc_nand_data->ecc_opt = |
| OMAP_ECC_BCH4_CODE_HW_DETECTION_SW; |
| else if (!strcmp(s, "bch8")) |
| if (gpmc_nand_data->elm_of_node) |
| gpmc_nand_data->ecc_opt = |
| OMAP_ECC_BCH8_CODE_HW; |
| else |
| gpmc_nand_data->ecc_opt = |
| OMAP_ECC_BCH8_CODE_HW_DETECTION_SW; |
| else |
| pr_err("%s: ti,nand-ecc-opt invalid value\n", __func__); |
| |
| /* select data transfer mode for NAND controller */ |
| if (!of_property_read_string(child, "ti,nand-xfer-type", &s)) |
| for (val = 0; val < ARRAY_SIZE(nand_xfer_types); val++) |
| if (!strcasecmp(s, nand_xfer_types[val])) { |
| gpmc_nand_data->xfer_type = val; |
| break; |
| } |
| |
| val = of_get_nand_bus_width(child); |
| if (val == 16) |
| gpmc_nand_data->devsize = NAND_BUSWIDTH_16; |
| |
| gpmc_read_timings_dt(child, &gpmc_t); |
| gpmc_nand_init(gpmc_nand_data, &gpmc_t); |
| |
| return 0; |
| } |
| #else |
| static int gpmc_probe_nand_child(struct platform_device *pdev, |
| struct device_node *child) |
| { |
| return 0; |
| } |
| #endif |
| |
| #if IS_ENABLED(CONFIG_MTD_ONENAND) |
| static int gpmc_probe_onenand_child(struct platform_device *pdev, |
| struct device_node *child) |
| { |
| u32 val; |
| struct omap_onenand_platform_data *gpmc_onenand_data; |
| |
| if (of_property_read_u32(child, "reg", &val) < 0) { |
| dev_err(&pdev->dev, "%s has no 'reg' property\n", |
| child->full_name); |
| return -ENODEV; |
| } |
| |
| gpmc_onenand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_onenand_data), |
| GFP_KERNEL); |
| if (!gpmc_onenand_data) |
| return -ENOMEM; |
| |
| gpmc_onenand_data->cs = val; |
| gpmc_onenand_data->of_node = child; |
| gpmc_onenand_data->dma_channel = -1; |
| |
| if (!of_property_read_u32(child, "dma-channel", &val)) |
| gpmc_onenand_data->dma_channel = val; |
| |
| gpmc_onenand_init(gpmc_onenand_data); |
| |
| return 0; |
| } |
| #else |
| static int gpmc_probe_onenand_child(struct platform_device *pdev, |
| struct device_node *child) |
| { |
| return 0; |
| } |
| #endif |
| |
| /** |
| * gpmc_probe_generic_child - configures the gpmc for a child device |
| * @pdev: pointer to gpmc platform device |
| * @child: pointer to device-tree node for child device |
| * |
| * Allocates and configures a GPMC chip-select for a child device. |
| * Returns 0 on success and appropriate negative error code on failure. |
| */ |
| static int gpmc_probe_generic_child(struct platform_device *pdev, |
| struct device_node *child) |
| { |
| struct gpmc_settings gpmc_s; |
| struct gpmc_timings gpmc_t; |
| struct resource res; |
| unsigned long base; |
| int ret, cs; |
| |
| if (of_property_read_u32(child, "reg", &cs) < 0) { |
| dev_err(&pdev->dev, "%s has no 'reg' property\n", |
| child->full_name); |
| return -ENODEV; |
| } |
| |
| if (of_address_to_resource(child, 0, &res) < 0) { |
| dev_err(&pdev->dev, "%s has malformed 'reg' property\n", |
| child->full_name); |
| return -ENODEV; |
| } |
| |
| ret = gpmc_cs_request(cs, resource_size(&res), &base); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs); |
| return ret; |
| } |
| |
| /* |
| * For some GPMC devices we still need to rely on the bootloader |
| * timings because the devices can be connected via FPGA. So far |
| * the list is smc91x on the omap2 SDP boards, and 8250 on zooms. |
| * REVISIT: Add timing support from slls644g.pdf and from the |
| * lan91c96 manual. |
| */ |
| if (of_device_is_compatible(child, "ns16550a") || |
| of_device_is_compatible(child, "smsc,lan91c94") || |
| of_device_is_compatible(child, "smsc,lan91c111")) { |
| dev_warn(&pdev->dev, |
| "%s using bootloader timings on CS%d\n", |
| child->name, cs); |
| goto no_timings; |
| } |
| |
| /* |
| * FIXME: gpmc_cs_request() will map the CS to an arbitary |
| * location in the gpmc address space. When booting with |
| * device-tree we want the NOR flash to be mapped to the |
| * location specified in the device-tree blob. So remap the |
| * CS to this location. Once DT migration is complete should |
| * just make gpmc_cs_request() map a specific address. |
| */ |
| ret = gpmc_cs_remap(cs, res.start); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "cannot remap GPMC CS %d to %pa\n", |
| cs, &res.start); |
| goto err; |
| } |
| |
| gpmc_read_settings_dt(child, &gpmc_s); |
| |
| ret = of_property_read_u32(child, "bank-width", &gpmc_s.device_width); |
| if (ret < 0) |
| goto err; |
| |
| ret = gpmc_cs_program_settings(cs, &gpmc_s); |
| if (ret < 0) |
| goto err; |
| |
| gpmc_read_timings_dt(child, &gpmc_t); |
| gpmc_cs_set_timings(cs, &gpmc_t); |
| |
| no_timings: |
| if (of_platform_device_create(child, NULL, &pdev->dev)) |
| return 0; |
| |
| dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name); |
| ret = -ENODEV; |
| |
| err: |
| gpmc_cs_free(cs); |
| |
| return ret; |
| } |
| |
| static int gpmc_probe_dt(struct platform_device *pdev) |
| { |
| int ret; |
| struct device_node *child; |
| const struct of_device_id *of_id = |
| of_match_device(gpmc_dt_ids, &pdev->dev); |
| |
| if (!of_id) |
| return 0; |
| |
| ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-cs", |
| &gpmc_cs_num); |
| if (ret < 0) { |
| pr_err("%s: number of chip-selects not defined\n", __func__); |
| return ret; |
| } else if (gpmc_cs_num < 1) { |
| pr_err("%s: all chip-selects are disabled\n", __func__); |
| return -EINVAL; |
| } else if (gpmc_cs_num > GPMC_CS_NUM) { |
| pr_err("%s: number of supported chip-selects cannot be > %d\n", |
| __func__, GPMC_CS_NUM); |
| return -EINVAL; |
| } |
| |
| ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-waitpins", |
| &gpmc_nr_waitpins); |
| if (ret < 0) { |
| pr_err("%s: number of wait pins not found!\n", __func__); |
| return ret; |
| } |
| |
| for_each_child_of_node(pdev->dev.of_node, child) { |
| |
| if (!child->name) |
| continue; |
| |
| if (of_node_cmp(child->name, "nand") == 0) |
| ret = gpmc_probe_nand_child(pdev, child); |
| else if (of_node_cmp(child->name, "onenand") == 0) |
| ret = gpmc_probe_onenand_child(pdev, child); |
| else if (of_node_cmp(child->name, "ethernet") == 0 || |
| of_node_cmp(child->name, "nor") == 0 || |
| of_node_cmp(child->name, "uart") == 0) |
| ret = gpmc_probe_generic_child(pdev, child); |
| |
| if (WARN(ret < 0, "%s: probing gpmc child %s failed\n", |
| __func__, child->full_name)) |
| of_node_put(child); |
| } |
| |
| return 0; |
| } |
| #else |
| static int gpmc_probe_dt(struct platform_device *pdev) |
| { |
| return 0; |
| } |
| #endif |
| |
| static int gpmc_probe(struct platform_device *pdev) |
| { |
| int rc; |
| u32 l; |
| struct resource *res; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (res == NULL) |
| return -ENOENT; |
| |
| phys_base = res->start; |
| mem_size = resource_size(res); |
| |
| gpmc_base = devm_ioremap_resource(&pdev->dev, res); |
| if (IS_ERR(gpmc_base)) |
| return PTR_ERR(gpmc_base); |
| |
| res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| if (res == NULL) |
| dev_warn(&pdev->dev, "Failed to get resource: irq\n"); |
| else |
| gpmc_irq = res->start; |
| |
| gpmc_l3_clk = clk_get(&pdev->dev, "fck"); |
| if (IS_ERR(gpmc_l3_clk)) { |
| dev_err(&pdev->dev, "error: clk_get\n"); |
| gpmc_irq = 0; |
| return PTR_ERR(gpmc_l3_clk); |
| } |
| |
| pm_runtime_enable(&pdev->dev); |
| pm_runtime_get_sync(&pdev->dev); |
| |
| gpmc_dev = &pdev->dev; |
| |
| l = gpmc_read_reg(GPMC_REVISION); |
| |
| /* |
| * FIXME: Once device-tree migration is complete the below flags |
| * should be populated based upon the device-tree compatible |
| * string. For now just use the IP revision. OMAP3+ devices have |
| * the wr_access and wr_data_mux_bus register fields. OMAP4+ |
| * devices support the addr-addr-data multiplex protocol. |
| * |
| * GPMC IP revisions: |
| * - OMAP24xx = 2.0 |
| * - OMAP3xxx = 5.0 |
| * - OMAP44xx/54xx/AM335x = 6.0 |
| */ |
| if (GPMC_REVISION_MAJOR(l) > 0x4) |
| gpmc_capability = GPMC_HAS_WR_ACCESS | GPMC_HAS_WR_DATA_MUX_BUS; |
| if (GPMC_REVISION_MAJOR(l) > 0x5) |
| gpmc_capability |= GPMC_HAS_MUX_AAD; |
| dev_info(gpmc_dev, "GPMC revision %d.%d\n", GPMC_REVISION_MAJOR(l), |
| GPMC_REVISION_MINOR(l)); |
| |
| gpmc_mem_init(); |
| |
| if (gpmc_setup_irq() < 0) |
| dev_warn(gpmc_dev, "gpmc_setup_irq failed\n"); |
| |
| /* Now the GPMC is initialised, unreserve the chip-selects */ |
| gpmc_cs_map = 0; |
| |
| if (!pdev->dev.of_node) { |
| gpmc_cs_num = GPMC_CS_NUM; |
| gpmc_nr_waitpins = GPMC_NR_WAITPINS; |
| } |
| |
| rc = gpmc_probe_dt(pdev); |
| if (rc < 0) { |
| pm_runtime_put_sync(&pdev->dev); |
| clk_put(gpmc_l3_clk); |
| dev_err(gpmc_dev, "failed to probe DT parameters\n"); |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| static int gpmc_remove(struct platform_device *pdev) |
| { |
| gpmc_free_irq(); |
| gpmc_mem_exit(); |
| pm_runtime_put_sync(&pdev->dev); |
| pm_runtime_disable(&pdev->dev); |
| gpmc_dev = NULL; |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int gpmc_suspend(struct device *dev) |
| { |
| omap3_gpmc_save_context(); |
| pm_runtime_put_sync(dev); |
| return 0; |
| } |
| |
| static int gpmc_resume(struct device *dev) |
| { |
| pm_runtime_get_sync(dev); |
| omap3_gpmc_restore_context(); |
| return 0; |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(gpmc_pm_ops, gpmc_suspend, gpmc_resume); |
| |
| static struct platform_driver gpmc_driver = { |
| .probe = gpmc_probe, |
| .remove = gpmc_remove, |
| .driver = { |
| .name = DEVICE_NAME, |
| .owner = THIS_MODULE, |
| .of_match_table = of_match_ptr(gpmc_dt_ids), |
| .pm = &gpmc_pm_ops, |
| }, |
| }; |
| |
| static __init int gpmc_init(void) |
| { |
| return platform_driver_register(&gpmc_driver); |
| } |
| |
| static __exit void gpmc_exit(void) |
| { |
| platform_driver_unregister(&gpmc_driver); |
| |
| } |
| |
| omap_postcore_initcall(gpmc_init); |
| module_exit(gpmc_exit); |
| |
| static int __init omap_gpmc_init(void) |
| { |
| struct omap_hwmod *oh; |
| struct platform_device *pdev; |
| char *oh_name = "gpmc"; |
| |
| /* |
| * if the board boots up with a populated DT, do not |
| * manually add the device from this initcall |
| */ |
| if (of_have_populated_dt()) |
| return -ENODEV; |
| |
| oh = omap_hwmod_lookup(oh_name); |
| if (!oh) { |
| pr_err("Could not look up %s\n", oh_name); |
| return -ENODEV; |
| } |
| |
| pdev = omap_device_build(DEVICE_NAME, -1, oh, NULL, 0); |
| WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name); |
| |
| return PTR_RET(pdev); |
| } |
| omap_postcore_initcall(omap_gpmc_init); |
| |
| static irqreturn_t gpmc_handle_irq(int irq, void *dev) |
| { |
| int i; |
| u32 regval; |
| |
| regval = gpmc_read_reg(GPMC_IRQSTATUS); |
| |
| if (!regval) |
| return IRQ_NONE; |
| |
| for (i = 0; i < GPMC_NR_IRQ; i++) |
| if (regval & gpmc_client_irq[i].bitmask) |
| generic_handle_irq(gpmc_client_irq[i].irq); |
| |
| gpmc_write_reg(GPMC_IRQSTATUS, regval); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static struct omap3_gpmc_regs gpmc_context; |
| |
| void omap3_gpmc_save_context(void) |
| { |
| int i; |
| |
| gpmc_context.sysconfig = gpmc_read_reg(GPMC_SYSCONFIG); |
| gpmc_context.irqenable = gpmc_read_reg(GPMC_IRQENABLE); |
| gpmc_context.timeout_ctrl = gpmc_read_reg(GPMC_TIMEOUT_CONTROL); |
| gpmc_context.config = gpmc_read_reg(GPMC_CONFIG); |
| gpmc_context.prefetch_config1 = gpmc_read_reg(GPMC_PREFETCH_CONFIG1); |
| gpmc_context.prefetch_config2 = gpmc_read_reg(GPMC_PREFETCH_CONFIG2); |
| gpmc_context.prefetch_control = gpmc_read_reg(GPMC_PREFETCH_CONTROL); |
| for (i = 0; i < gpmc_cs_num; i++) { |
| gpmc_context.cs_context[i].is_valid = gpmc_cs_mem_enabled(i); |
| if (gpmc_context.cs_context[i].is_valid) { |
| gpmc_context.cs_context[i].config1 = |
| gpmc_cs_read_reg(i, GPMC_CS_CONFIG1); |
| gpmc_context.cs_context[i].config2 = |
| gpmc_cs_read_reg(i, GPMC_CS_CONFIG2); |
| gpmc_context.cs_context[i].config3 = |
| gpmc_cs_read_reg(i, GPMC_CS_CONFIG3); |
| gpmc_context.cs_context[i].config4 = |
| gpmc_cs_read_reg(i, GPMC_CS_CONFIG4); |
| gpmc_context.cs_context[i].config5 = |
| gpmc_cs_read_reg(i, GPMC_CS_CONFIG5); |
| gpmc_context.cs_context[i].config6 = |
| gpmc_cs_read_reg(i, GPMC_CS_CONFIG6); |
| gpmc_context.cs_context[i].config7 = |
| gpmc_cs_read_reg(i, GPMC_CS_CONFIG7); |
| } |
| } |
| } |
| |
| void omap3_gpmc_restore_context(void) |
| { |
| int i; |
| |
| gpmc_write_reg(GPMC_SYSCONFIG, gpmc_context.sysconfig); |
| gpmc_write_reg(GPMC_IRQENABLE, gpmc_context.irqenable); |
| gpmc_write_reg(GPMC_TIMEOUT_CONTROL, gpmc_context.timeout_ctrl); |
| gpmc_write_reg(GPMC_CONFIG, gpmc_context.config); |
| gpmc_write_reg(GPMC_PREFETCH_CONFIG1, gpmc_context.prefetch_config1); |
| gpmc_write_reg(GPMC_PREFETCH_CONFIG2, gpmc_context.prefetch_config2); |
| gpmc_write_reg(GPMC_PREFETCH_CONTROL, gpmc_context.prefetch_control); |
| for (i = 0; i < gpmc_cs_num; i++) { |
| if (gpmc_context.cs_context[i].is_valid) { |
| gpmc_cs_write_reg(i, GPMC_CS_CONFIG1, |
| gpmc_context.cs_context[i].config1); |
| gpmc_cs_write_reg(i, GPMC_CS_CONFIG2, |
| gpmc_context.cs_context[i].config2); |
| gpmc_cs_write_reg(i, GPMC_CS_CONFIG3, |
| gpmc_context.cs_context[i].config3); |
| gpmc_cs_write_reg(i, GPMC_CS_CONFIG4, |
| gpmc_context.cs_context[i].config4); |
| gpmc_cs_write_reg(i, GPMC_CS_CONFIG5, |
| gpmc_context.cs_context[i].config5); |
| gpmc_cs_write_reg(i, GPMC_CS_CONFIG6, |
| gpmc_context.cs_context[i].config6); |
| gpmc_cs_write_reg(i, GPMC_CS_CONFIG7, |
| gpmc_context.cs_context[i].config7); |
| } |
| } |
| } |