| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>, |
| Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker |
| <mdsxyz123@yahoo.com> |
| Copyright (C) 2007 - 2014 Jean Delvare <jdelvare@suse.de> |
| Copyright (C) 2010 Intel Corporation, |
| David Woodhouse <dwmw2@infradead.org> |
| |
| */ |
| |
| /* |
| * Supports the following Intel I/O Controller Hubs (ICH): |
| * |
| * I/O Block I2C |
| * region SMBus Block proc. block |
| * Chip name PCI ID size PEC buffer call read |
| * --------------------------------------------------------------------------- |
| * 82801AA (ICH) 0x2413 16 no no no no |
| * 82801AB (ICH0) 0x2423 16 no no no no |
| * 82801BA (ICH2) 0x2443 16 no no no no |
| * 82801CA (ICH3) 0x2483 32 soft no no no |
| * 82801DB (ICH4) 0x24c3 32 hard yes no no |
| * 82801E (ICH5) 0x24d3 32 hard yes yes yes |
| * 6300ESB 0x25a4 32 hard yes yes yes |
| * 82801F (ICH6) 0x266a 32 hard yes yes yes |
| * 6310ESB/6320ESB 0x269b 32 hard yes yes yes |
| * 82801G (ICH7) 0x27da 32 hard yes yes yes |
| * 82801H (ICH8) 0x283e 32 hard yes yes yes |
| * 82801I (ICH9) 0x2930 32 hard yes yes yes |
| * EP80579 (Tolapai) 0x5032 32 hard yes yes yes |
| * ICH10 0x3a30 32 hard yes yes yes |
| * ICH10 0x3a60 32 hard yes yes yes |
| * 5/3400 Series (PCH) 0x3b30 32 hard yes yes yes |
| * 6 Series (PCH) 0x1c22 32 hard yes yes yes |
| * Patsburg (PCH) 0x1d22 32 hard yes yes yes |
| * Patsburg (PCH) IDF 0x1d70 32 hard yes yes yes |
| * Patsburg (PCH) IDF 0x1d71 32 hard yes yes yes |
| * Patsburg (PCH) IDF 0x1d72 32 hard yes yes yes |
| * DH89xxCC (PCH) 0x2330 32 hard yes yes yes |
| * Panther Point (PCH) 0x1e22 32 hard yes yes yes |
| * Lynx Point (PCH) 0x8c22 32 hard yes yes yes |
| * Lynx Point-LP (PCH) 0x9c22 32 hard yes yes yes |
| * Avoton (SOC) 0x1f3c 32 hard yes yes yes |
| * Wellsburg (PCH) 0x8d22 32 hard yes yes yes |
| * Wellsburg (PCH) MS 0x8d7d 32 hard yes yes yes |
| * Wellsburg (PCH) MS 0x8d7e 32 hard yes yes yes |
| * Wellsburg (PCH) MS 0x8d7f 32 hard yes yes yes |
| * Coleto Creek (PCH) 0x23b0 32 hard yes yes yes |
| * Wildcat Point (PCH) 0x8ca2 32 hard yes yes yes |
| * Wildcat Point-LP (PCH) 0x9ca2 32 hard yes yes yes |
| * BayTrail (SOC) 0x0f12 32 hard yes yes yes |
| * Braswell (SOC) 0x2292 32 hard yes yes yes |
| * Sunrise Point-H (PCH) 0xa123 32 hard yes yes yes |
| * Sunrise Point-LP (PCH) 0x9d23 32 hard yes yes yes |
| * DNV (SOC) 0x19df 32 hard yes yes yes |
| * Broxton (SOC) 0x5ad4 32 hard yes yes yes |
| * Lewisburg (PCH) 0xa1a3 32 hard yes yes yes |
| * Lewisburg Supersku (PCH) 0xa223 32 hard yes yes yes |
| * Kaby Lake PCH-H (PCH) 0xa2a3 32 hard yes yes yes |
| * Gemini Lake (SOC) 0x31d4 32 hard yes yes yes |
| * Cannon Lake-H (PCH) 0xa323 32 hard yes yes yes |
| * Cannon Lake-LP (PCH) 0x9da3 32 hard yes yes yes |
| * Cedar Fork (PCH) 0x18df 32 hard yes yes yes |
| * Ice Lake-LP (PCH) 0x34a3 32 hard yes yes yes |
| * Comet Lake (PCH) 0x02a3 32 hard yes yes yes |
| * Elkhart Lake (PCH) 0x4b23 32 hard yes yes yes |
| * Tiger Lake-LP (PCH) 0xa0a3 32 hard yes yes yes |
| * |
| * Features supported by this driver: |
| * Software PEC no |
| * Hardware PEC yes |
| * Block buffer yes |
| * Block process call transaction yes |
| * I2C block read transaction yes (doesn't use the block buffer) |
| * Slave mode no |
| * SMBus Host Notify yes |
| * Interrupt processing yes |
| * |
| * See the file Documentation/i2c/busses/i2c-i801.rst for details. |
| */ |
| |
| #include <linux/interrupt.h> |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| #include <linux/kernel.h> |
| #include <linux/stddef.h> |
| #include <linux/delay.h> |
| #include <linux/ioport.h> |
| #include <linux/init.h> |
| #include <linux/i2c.h> |
| #include <linux/i2c-smbus.h> |
| #include <linux/acpi.h> |
| #include <linux/io.h> |
| #include <linux/dmi.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/wait.h> |
| #include <linux/err.h> |
| #include <linux/platform_device.h> |
| #include <linux/platform_data/itco_wdt.h> |
| #include <linux/pm_runtime.h> |
| |
| #if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI |
| #include <linux/gpio/machine.h> |
| #include <linux/platform_data/i2c-mux-gpio.h> |
| #endif |
| |
| /* I801 SMBus address offsets */ |
| #define SMBHSTSTS(p) (0 + (p)->smba) |
| #define SMBHSTCNT(p) (2 + (p)->smba) |
| #define SMBHSTCMD(p) (3 + (p)->smba) |
| #define SMBHSTADD(p) (4 + (p)->smba) |
| #define SMBHSTDAT0(p) (5 + (p)->smba) |
| #define SMBHSTDAT1(p) (6 + (p)->smba) |
| #define SMBBLKDAT(p) (7 + (p)->smba) |
| #define SMBPEC(p) (8 + (p)->smba) /* ICH3 and later */ |
| #define SMBAUXSTS(p) (12 + (p)->smba) /* ICH4 and later */ |
| #define SMBAUXCTL(p) (13 + (p)->smba) /* ICH4 and later */ |
| #define SMBSLVSTS(p) (16 + (p)->smba) /* ICH3 and later */ |
| #define SMBSLVCMD(p) (17 + (p)->smba) /* ICH3 and later */ |
| #define SMBNTFDADD(p) (20 + (p)->smba) /* ICH3 and later */ |
| |
| /* PCI Address Constants */ |
| #define SMBBAR 4 |
| #define SMBPCICTL 0x004 |
| #define SMBPCISTS 0x006 |
| #define SMBHSTCFG 0x040 |
| #define TCOBASE 0x050 |
| #define TCOCTL 0x054 |
| |
| #define ACPIBASE 0x040 |
| #define ACPIBASE_SMI_OFF 0x030 |
| #define ACPICTRL 0x044 |
| #define ACPICTRL_EN 0x080 |
| |
| #define SBREG_BAR 0x10 |
| #define SBREG_SMBCTRL 0xc6000c |
| #define SBREG_SMBCTRL_DNV 0xcf000c |
| |
| /* Host status bits for SMBPCISTS */ |
| #define SMBPCISTS_INTS BIT(3) |
| |
| /* Control bits for SMBPCICTL */ |
| #define SMBPCICTL_INTDIS BIT(10) |
| |
| /* Host configuration bits for SMBHSTCFG */ |
| #define SMBHSTCFG_HST_EN BIT(0) |
| #define SMBHSTCFG_SMB_SMI_EN BIT(1) |
| #define SMBHSTCFG_I2C_EN BIT(2) |
| #define SMBHSTCFG_SPD_WD BIT(4) |
| |
| /* TCO configuration bits for TCOCTL */ |
| #define TCOCTL_EN BIT(8) |
| |
| /* Auxiliary status register bits, ICH4+ only */ |
| #define SMBAUXSTS_CRCE BIT(0) |
| #define SMBAUXSTS_STCO BIT(1) |
| |
| /* Auxiliary control register bits, ICH4+ only */ |
| #define SMBAUXCTL_CRC BIT(0) |
| #define SMBAUXCTL_E32B BIT(1) |
| |
| /* Other settings */ |
| #define MAX_RETRIES 400 |
| |
| /* I801 command constants */ |
| #define I801_QUICK 0x00 |
| #define I801_BYTE 0x04 |
| #define I801_BYTE_DATA 0x08 |
| #define I801_WORD_DATA 0x0C |
| #define I801_PROC_CALL 0x10 /* unimplemented */ |
| #define I801_BLOCK_DATA 0x14 |
| #define I801_I2C_BLOCK_DATA 0x18 /* ICH5 and later */ |
| #define I801_BLOCK_PROC_CALL 0x1C |
| |
| /* I801 Host Control register bits */ |
| #define SMBHSTCNT_INTREN BIT(0) |
| #define SMBHSTCNT_KILL BIT(1) |
| #define SMBHSTCNT_LAST_BYTE BIT(5) |
| #define SMBHSTCNT_START BIT(6) |
| #define SMBHSTCNT_PEC_EN BIT(7) /* ICH3 and later */ |
| |
| /* I801 Hosts Status register bits */ |
| #define SMBHSTSTS_BYTE_DONE BIT(7) |
| #define SMBHSTSTS_INUSE_STS BIT(6) |
| #define SMBHSTSTS_SMBALERT_STS BIT(5) |
| #define SMBHSTSTS_FAILED BIT(4) |
| #define SMBHSTSTS_BUS_ERR BIT(3) |
| #define SMBHSTSTS_DEV_ERR BIT(2) |
| #define SMBHSTSTS_INTR BIT(1) |
| #define SMBHSTSTS_HOST_BUSY BIT(0) |
| |
| /* Host Notify Status register bits */ |
| #define SMBSLVSTS_HST_NTFY_STS BIT(0) |
| |
| /* Host Notify Command register bits */ |
| #define SMBSLVCMD_HST_NTFY_INTREN BIT(0) |
| |
| #define STATUS_ERROR_FLAGS (SMBHSTSTS_FAILED | SMBHSTSTS_BUS_ERR | \ |
| SMBHSTSTS_DEV_ERR) |
| |
| #define STATUS_FLAGS (SMBHSTSTS_BYTE_DONE | SMBHSTSTS_INTR | \ |
| STATUS_ERROR_FLAGS) |
| |
| /* Older devices have their ID defined in <linux/pci_ids.h> */ |
| #define PCI_DEVICE_ID_INTEL_COMETLAKE_SMBUS 0x02a3 |
| #define PCI_DEVICE_ID_INTEL_BAYTRAIL_SMBUS 0x0f12 |
| #define PCI_DEVICE_ID_INTEL_CDF_SMBUS 0x18df |
| #define PCI_DEVICE_ID_INTEL_DNV_SMBUS 0x19df |
| #define PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS 0x1c22 |
| #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS 0x1d22 |
| /* Patsburg also has three 'Integrated Device Function' SMBus controllers */ |
| #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0 0x1d70 |
| #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1 0x1d71 |
| #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2 0x1d72 |
| #define PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS 0x1e22 |
| #define PCI_DEVICE_ID_INTEL_AVOTON_SMBUS 0x1f3c |
| #define PCI_DEVICE_ID_INTEL_BRASWELL_SMBUS 0x2292 |
| #define PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS 0x2330 |
| #define PCI_DEVICE_ID_INTEL_COLETOCREEK_SMBUS 0x23b0 |
| #define PCI_DEVICE_ID_INTEL_GEMINILAKE_SMBUS 0x31d4 |
| #define PCI_DEVICE_ID_INTEL_ICELAKE_LP_SMBUS 0x34a3 |
| #define PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS 0x3b30 |
| #define PCI_DEVICE_ID_INTEL_ELKHART_LAKE_SMBUS 0x4b23 |
| #define PCI_DEVICE_ID_INTEL_BROXTON_SMBUS 0x5ad4 |
| #define PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS 0x8c22 |
| #define PCI_DEVICE_ID_INTEL_WILDCATPOINT_SMBUS 0x8ca2 |
| #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS 0x8d22 |
| #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS0 0x8d7d |
| #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1 0x8d7e |
| #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2 0x8d7f |
| #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_SMBUS 0x9c22 |
| #define PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_SMBUS 0x9ca2 |
| #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS 0x9d23 |
| #define PCI_DEVICE_ID_INTEL_CANNONLAKE_LP_SMBUS 0x9da3 |
| #define PCI_DEVICE_ID_INTEL_TIGERLAKE_LP_SMBUS 0xa0a3 |
| #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS 0xa123 |
| #define PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS 0xa1a3 |
| #define PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS 0xa223 |
| #define PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS 0xa2a3 |
| #define PCI_DEVICE_ID_INTEL_CANNONLAKE_H_SMBUS 0xa323 |
| |
| struct i801_mux_config { |
| char *gpio_chip; |
| unsigned values[3]; |
| int n_values; |
| unsigned classes[3]; |
| unsigned gpios[2]; /* Relative to gpio_chip->base */ |
| int n_gpios; |
| }; |
| |
| struct i801_priv { |
| struct i2c_adapter adapter; |
| unsigned long smba; |
| unsigned char original_hstcfg; |
| unsigned char original_slvcmd; |
| struct pci_dev *pci_dev; |
| unsigned int features; |
| |
| /* isr processing */ |
| wait_queue_head_t waitq; |
| u8 status; |
| |
| /* Command state used by isr for byte-by-byte block transactions */ |
| u8 cmd; |
| bool is_read; |
| int count; |
| int len; |
| u8 *data; |
| |
| #if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI |
| const struct i801_mux_config *mux_drvdata; |
| struct platform_device *mux_pdev; |
| struct gpiod_lookup_table *lookup; |
| #endif |
| struct platform_device *tco_pdev; |
| |
| /* |
| * If set to true the host controller registers are reserved for |
| * ACPI AML use. Protected by acpi_lock. |
| */ |
| bool acpi_reserved; |
| struct mutex acpi_lock; |
| }; |
| |
| #define FEATURE_SMBUS_PEC BIT(0) |
| #define FEATURE_BLOCK_BUFFER BIT(1) |
| #define FEATURE_BLOCK_PROC BIT(2) |
| #define FEATURE_I2C_BLOCK_READ BIT(3) |
| #define FEATURE_IRQ BIT(4) |
| #define FEATURE_HOST_NOTIFY BIT(5) |
| /* Not really a feature, but it's convenient to handle it as such */ |
| #define FEATURE_IDF BIT(15) |
| #define FEATURE_TCO_SPT BIT(16) |
| #define FEATURE_TCO_CNL BIT(17) |
| |
| static const char *i801_feature_names[] = { |
| "SMBus PEC", |
| "Block buffer", |
| "Block process call", |
| "I2C block read", |
| "Interrupt", |
| "SMBus Host Notify", |
| }; |
| |
| static unsigned int disable_features; |
| module_param(disable_features, uint, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(disable_features, "Disable selected driver features:\n" |
| "\t\t 0x01 disable SMBus PEC\n" |
| "\t\t 0x02 disable the block buffer\n" |
| "\t\t 0x08 disable the I2C block read functionality\n" |
| "\t\t 0x10 don't use interrupts\n" |
| "\t\t 0x20 disable SMBus Host Notify "); |
| |
| /* Make sure the SMBus host is ready to start transmitting. |
| Return 0 if it is, -EBUSY if it is not. */ |
| static int i801_check_pre(struct i801_priv *priv) |
| { |
| int status; |
| |
| status = inb_p(SMBHSTSTS(priv)); |
| if (status & SMBHSTSTS_HOST_BUSY) { |
| dev_err(&priv->pci_dev->dev, "SMBus is busy, can't use it!\n"); |
| return -EBUSY; |
| } |
| |
| status &= STATUS_FLAGS; |
| if (status) { |
| dev_dbg(&priv->pci_dev->dev, "Clearing status flags (%02x)\n", |
| status); |
| outb_p(status, SMBHSTSTS(priv)); |
| status = inb_p(SMBHSTSTS(priv)) & STATUS_FLAGS; |
| if (status) { |
| dev_err(&priv->pci_dev->dev, |
| "Failed clearing status flags (%02x)\n", |
| status); |
| return -EBUSY; |
| } |
| } |
| |
| /* |
| * Clear CRC status if needed. |
| * During normal operation, i801_check_post() takes care |
| * of it after every operation. We do it here only in case |
| * the hardware was already in this state when the driver |
| * started. |
| */ |
| if (priv->features & FEATURE_SMBUS_PEC) { |
| status = inb_p(SMBAUXSTS(priv)) & SMBAUXSTS_CRCE; |
| if (status) { |
| dev_dbg(&priv->pci_dev->dev, |
| "Clearing aux status flags (%02x)\n", status); |
| outb_p(status, SMBAUXSTS(priv)); |
| status = inb_p(SMBAUXSTS(priv)) & SMBAUXSTS_CRCE; |
| if (status) { |
| dev_err(&priv->pci_dev->dev, |
| "Failed clearing aux status flags (%02x)\n", |
| status); |
| return -EBUSY; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Convert the status register to an error code, and clear it. |
| * Note that status only contains the bits we want to clear, not the |
| * actual register value. |
| */ |
| static int i801_check_post(struct i801_priv *priv, int status) |
| { |
| int result = 0; |
| |
| /* |
| * If the SMBus is still busy, we give up |
| * Note: This timeout condition only happens when using polling |
| * transactions. For interrupt operation, NAK/timeout is indicated by |
| * DEV_ERR. |
| */ |
| if (unlikely(status < 0)) { |
| dev_err(&priv->pci_dev->dev, "Transaction timeout\n"); |
| /* try to stop the current command */ |
| dev_dbg(&priv->pci_dev->dev, "Terminating the current operation\n"); |
| outb_p(inb_p(SMBHSTCNT(priv)) | SMBHSTCNT_KILL, |
| SMBHSTCNT(priv)); |
| usleep_range(1000, 2000); |
| outb_p(inb_p(SMBHSTCNT(priv)) & (~SMBHSTCNT_KILL), |
| SMBHSTCNT(priv)); |
| |
| /* Check if it worked */ |
| status = inb_p(SMBHSTSTS(priv)); |
| if ((status & SMBHSTSTS_HOST_BUSY) || |
| !(status & SMBHSTSTS_FAILED)) |
| dev_err(&priv->pci_dev->dev, |
| "Failed terminating the transaction\n"); |
| outb_p(STATUS_FLAGS, SMBHSTSTS(priv)); |
| return -ETIMEDOUT; |
| } |
| |
| if (status & SMBHSTSTS_FAILED) { |
| result = -EIO; |
| dev_err(&priv->pci_dev->dev, "Transaction failed\n"); |
| } |
| if (status & SMBHSTSTS_DEV_ERR) { |
| /* |
| * This may be a PEC error, check and clear it. |
| * |
| * AUXSTS is handled differently from HSTSTS. |
| * For HSTSTS, i801_isr() or i801_wait_intr() |
| * has already cleared the error bits in hardware, |
| * and we are passed a copy of the original value |
| * in "status". |
| * For AUXSTS, the hardware register is left |
| * for us to handle here. |
| * This is asymmetric, slightly iffy, but safe, |
| * since all this code is serialized and the CRCE |
| * bit is harmless as long as it's cleared before |
| * the next operation. |
| */ |
| if ((priv->features & FEATURE_SMBUS_PEC) && |
| (inb_p(SMBAUXSTS(priv)) & SMBAUXSTS_CRCE)) { |
| outb_p(SMBAUXSTS_CRCE, SMBAUXSTS(priv)); |
| result = -EBADMSG; |
| dev_dbg(&priv->pci_dev->dev, "PEC error\n"); |
| } else { |
| result = -ENXIO; |
| dev_dbg(&priv->pci_dev->dev, "No response\n"); |
| } |
| } |
| if (status & SMBHSTSTS_BUS_ERR) { |
| result = -EAGAIN; |
| dev_dbg(&priv->pci_dev->dev, "Lost arbitration\n"); |
| } |
| |
| /* Clear status flags except BYTE_DONE, to be cleared by caller */ |
| outb_p(status, SMBHSTSTS(priv)); |
| |
| return result; |
| } |
| |
| /* Wait for BUSY being cleared and either INTR or an error flag being set */ |
| static int i801_wait_intr(struct i801_priv *priv) |
| { |
| int timeout = 0; |
| int status; |
| |
| /* We will always wait for a fraction of a second! */ |
| do { |
| usleep_range(250, 500); |
| status = inb_p(SMBHSTSTS(priv)); |
| } while (((status & SMBHSTSTS_HOST_BUSY) || |
| !(status & (STATUS_ERROR_FLAGS | SMBHSTSTS_INTR))) && |
| (timeout++ < MAX_RETRIES)); |
| |
| if (timeout > MAX_RETRIES) { |
| dev_dbg(&priv->pci_dev->dev, "INTR Timeout!\n"); |
| return -ETIMEDOUT; |
| } |
| return status & (STATUS_ERROR_FLAGS | SMBHSTSTS_INTR); |
| } |
| |
| /* Wait for either BYTE_DONE or an error flag being set */ |
| static int i801_wait_byte_done(struct i801_priv *priv) |
| { |
| int timeout = 0; |
| int status; |
| |
| /* We will always wait for a fraction of a second! */ |
| do { |
| usleep_range(250, 500); |
| status = inb_p(SMBHSTSTS(priv)); |
| } while (!(status & (STATUS_ERROR_FLAGS | SMBHSTSTS_BYTE_DONE)) && |
| (timeout++ < MAX_RETRIES)); |
| |
| if (timeout > MAX_RETRIES) { |
| dev_dbg(&priv->pci_dev->dev, "BYTE_DONE Timeout!\n"); |
| return -ETIMEDOUT; |
| } |
| return status & STATUS_ERROR_FLAGS; |
| } |
| |
| static int i801_transaction(struct i801_priv *priv, int xact) |
| { |
| int status; |
| int result; |
| const struct i2c_adapter *adap = &priv->adapter; |
| |
| result = i801_check_pre(priv); |
| if (result < 0) |
| return result; |
| |
| if (priv->features & FEATURE_IRQ) { |
| outb_p(xact | SMBHSTCNT_INTREN | SMBHSTCNT_START, |
| SMBHSTCNT(priv)); |
| result = wait_event_timeout(priv->waitq, |
| (status = priv->status), |
| adap->timeout); |
| if (!result) { |
| status = -ETIMEDOUT; |
| dev_warn(&priv->pci_dev->dev, |
| "Timeout waiting for interrupt!\n"); |
| } |
| priv->status = 0; |
| return i801_check_post(priv, status); |
| } |
| |
| /* the current contents of SMBHSTCNT can be overwritten, since PEC, |
| * SMBSCMD are passed in xact */ |
| outb_p(xact | SMBHSTCNT_START, SMBHSTCNT(priv)); |
| |
| status = i801_wait_intr(priv); |
| return i801_check_post(priv, status); |
| } |
| |
| static int i801_block_transaction_by_block(struct i801_priv *priv, |
| union i2c_smbus_data *data, |
| char read_write, int command, |
| int hwpec) |
| { |
| int i, len; |
| int status; |
| int xact = hwpec ? SMBHSTCNT_PEC_EN : 0; |
| |
| switch (command) { |
| case I2C_SMBUS_BLOCK_PROC_CALL: |
| xact |= I801_BLOCK_PROC_CALL; |
| break; |
| case I2C_SMBUS_BLOCK_DATA: |
| xact |= I801_BLOCK_DATA; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| inb_p(SMBHSTCNT(priv)); /* reset the data buffer index */ |
| |
| /* Use 32-byte buffer to process this transaction */ |
| if (read_write == I2C_SMBUS_WRITE) { |
| len = data->block[0]; |
| outb_p(len, SMBHSTDAT0(priv)); |
| for (i = 0; i < len; i++) |
| outb_p(data->block[i+1], SMBBLKDAT(priv)); |
| } |
| |
| status = i801_transaction(priv, xact); |
| if (status) |
| return status; |
| |
| if (read_write == I2C_SMBUS_READ || |
| command == I2C_SMBUS_BLOCK_PROC_CALL) { |
| len = inb_p(SMBHSTDAT0(priv)); |
| if (len < 1 || len > I2C_SMBUS_BLOCK_MAX) |
| return -EPROTO; |
| |
| data->block[0] = len; |
| for (i = 0; i < len; i++) |
| data->block[i + 1] = inb_p(SMBBLKDAT(priv)); |
| } |
| return 0; |
| } |
| |
| static void i801_isr_byte_done(struct i801_priv *priv) |
| { |
| if (priv->is_read) { |
| /* For SMBus block reads, length is received with first byte */ |
| if (((priv->cmd & 0x1c) == I801_BLOCK_DATA) && |
| (priv->count == 0)) { |
| priv->len = inb_p(SMBHSTDAT0(priv)); |
| if (priv->len < 1 || priv->len > I2C_SMBUS_BLOCK_MAX) { |
| dev_err(&priv->pci_dev->dev, |
| "Illegal SMBus block read size %d\n", |
| priv->len); |
| /* FIXME: Recover */ |
| priv->len = I2C_SMBUS_BLOCK_MAX; |
| } else { |
| dev_dbg(&priv->pci_dev->dev, |
| "SMBus block read size is %d\n", |
| priv->len); |
| } |
| priv->data[-1] = priv->len; |
| } |
| |
| /* Read next byte */ |
| if (priv->count < priv->len) |
| priv->data[priv->count++] = inb(SMBBLKDAT(priv)); |
| else |
| dev_dbg(&priv->pci_dev->dev, |
| "Discarding extra byte on block read\n"); |
| |
| /* Set LAST_BYTE for last byte of read transaction */ |
| if (priv->count == priv->len - 1) |
| outb_p(priv->cmd | SMBHSTCNT_LAST_BYTE, |
| SMBHSTCNT(priv)); |
| } else if (priv->count < priv->len - 1) { |
| /* Write next byte, except for IRQ after last byte */ |
| outb_p(priv->data[++priv->count], SMBBLKDAT(priv)); |
| } |
| |
| /* Clear BYTE_DONE to continue with next byte */ |
| outb_p(SMBHSTSTS_BYTE_DONE, SMBHSTSTS(priv)); |
| } |
| |
| static irqreturn_t i801_host_notify_isr(struct i801_priv *priv) |
| { |
| unsigned short addr; |
| |
| addr = inb_p(SMBNTFDADD(priv)) >> 1; |
| |
| /* |
| * With the tested platforms, reading SMBNTFDDAT (22 + (p)->smba) |
| * always returns 0. Our current implementation doesn't provide |
| * data, so we just ignore it. |
| */ |
| i2c_handle_smbus_host_notify(&priv->adapter, addr); |
| |
| /* clear Host Notify bit and return */ |
| outb_p(SMBSLVSTS_HST_NTFY_STS, SMBSLVSTS(priv)); |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * There are three kinds of interrupts: |
| * |
| * 1) i801 signals transaction completion with one of these interrupts: |
| * INTR - Success |
| * DEV_ERR - Invalid command, NAK or communication timeout |
| * BUS_ERR - SMI# transaction collision |
| * FAILED - transaction was canceled due to a KILL request |
| * When any of these occur, update ->status and wake up the waitq. |
| * ->status must be cleared before kicking off the next transaction. |
| * |
| * 2) For byte-by-byte (I2C read/write) transactions, one BYTE_DONE interrupt |
| * occurs for each byte of a byte-by-byte to prepare the next byte. |
| * |
| * 3) Host Notify interrupts |
| */ |
| static irqreturn_t i801_isr(int irq, void *dev_id) |
| { |
| struct i801_priv *priv = dev_id; |
| u16 pcists; |
| u8 status; |
| |
| /* Confirm this is our interrupt */ |
| pci_read_config_word(priv->pci_dev, SMBPCISTS, &pcists); |
| if (!(pcists & SMBPCISTS_INTS)) |
| return IRQ_NONE; |
| |
| if (priv->features & FEATURE_HOST_NOTIFY) { |
| status = inb_p(SMBSLVSTS(priv)); |
| if (status & SMBSLVSTS_HST_NTFY_STS) |
| return i801_host_notify_isr(priv); |
| } |
| |
| status = inb_p(SMBHSTSTS(priv)); |
| if (status & SMBHSTSTS_BYTE_DONE) |
| i801_isr_byte_done(priv); |
| |
| /* |
| * Clear irq sources and report transaction result. |
| * ->status must be cleared before the next transaction is started. |
| */ |
| status &= SMBHSTSTS_INTR | STATUS_ERROR_FLAGS; |
| if (status) { |
| outb_p(status, SMBHSTSTS(priv)); |
| priv->status = status; |
| wake_up(&priv->waitq); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * For "byte-by-byte" block transactions: |
| * I2C write uses cmd=I801_BLOCK_DATA, I2C_EN=1 |
| * I2C read uses cmd=I801_I2C_BLOCK_DATA |
| */ |
| static int i801_block_transaction_byte_by_byte(struct i801_priv *priv, |
| union i2c_smbus_data *data, |
| char read_write, int command, |
| int hwpec) |
| { |
| int i, len; |
| int smbcmd; |
| int status; |
| int result; |
| const struct i2c_adapter *adap = &priv->adapter; |
| |
| if (command == I2C_SMBUS_BLOCK_PROC_CALL) |
| return -EOPNOTSUPP; |
| |
| result = i801_check_pre(priv); |
| if (result < 0) |
| return result; |
| |
| len = data->block[0]; |
| |
| if (read_write == I2C_SMBUS_WRITE) { |
| outb_p(len, SMBHSTDAT0(priv)); |
| outb_p(data->block[1], SMBBLKDAT(priv)); |
| } |
| |
| if (command == I2C_SMBUS_I2C_BLOCK_DATA && |
| read_write == I2C_SMBUS_READ) |
| smbcmd = I801_I2C_BLOCK_DATA; |
| else |
| smbcmd = I801_BLOCK_DATA; |
| |
| if (priv->features & FEATURE_IRQ) { |
| priv->is_read = (read_write == I2C_SMBUS_READ); |
| if (len == 1 && priv->is_read) |
| smbcmd |= SMBHSTCNT_LAST_BYTE; |
| priv->cmd = smbcmd | SMBHSTCNT_INTREN; |
| priv->len = len; |
| priv->count = 0; |
| priv->data = &data->block[1]; |
| |
| outb_p(priv->cmd | SMBHSTCNT_START, SMBHSTCNT(priv)); |
| result = wait_event_timeout(priv->waitq, |
| (status = priv->status), |
| adap->timeout); |
| if (!result) { |
| status = -ETIMEDOUT; |
| dev_warn(&priv->pci_dev->dev, |
| "Timeout waiting for interrupt!\n"); |
| } |
| priv->status = 0; |
| return i801_check_post(priv, status); |
| } |
| |
| for (i = 1; i <= len; i++) { |
| if (i == len && read_write == I2C_SMBUS_READ) |
| smbcmd |= SMBHSTCNT_LAST_BYTE; |
| outb_p(smbcmd, SMBHSTCNT(priv)); |
| |
| if (i == 1) |
| outb_p(inb(SMBHSTCNT(priv)) | SMBHSTCNT_START, |
| SMBHSTCNT(priv)); |
| |
| status = i801_wait_byte_done(priv); |
| if (status) |
| goto exit; |
| |
| if (i == 1 && read_write == I2C_SMBUS_READ |
| && command != I2C_SMBUS_I2C_BLOCK_DATA) { |
| len = inb_p(SMBHSTDAT0(priv)); |
| if (len < 1 || len > I2C_SMBUS_BLOCK_MAX) { |
| dev_err(&priv->pci_dev->dev, |
| "Illegal SMBus block read size %d\n", |
| len); |
| /* Recover */ |
| while (inb_p(SMBHSTSTS(priv)) & |
| SMBHSTSTS_HOST_BUSY) |
| outb_p(SMBHSTSTS_BYTE_DONE, |
| SMBHSTSTS(priv)); |
| outb_p(SMBHSTSTS_INTR, SMBHSTSTS(priv)); |
| return -EPROTO; |
| } |
| data->block[0] = len; |
| } |
| |
| /* Retrieve/store value in SMBBLKDAT */ |
| if (read_write == I2C_SMBUS_READ) |
| data->block[i] = inb_p(SMBBLKDAT(priv)); |
| if (read_write == I2C_SMBUS_WRITE && i+1 <= len) |
| outb_p(data->block[i+1], SMBBLKDAT(priv)); |
| |
| /* signals SMBBLKDAT ready */ |
| outb_p(SMBHSTSTS_BYTE_DONE, SMBHSTSTS(priv)); |
| } |
| |
| status = i801_wait_intr(priv); |
| exit: |
| return i801_check_post(priv, status); |
| } |
| |
| static int i801_set_block_buffer_mode(struct i801_priv *priv) |
| { |
| outb_p(inb_p(SMBAUXCTL(priv)) | SMBAUXCTL_E32B, SMBAUXCTL(priv)); |
| if ((inb_p(SMBAUXCTL(priv)) & SMBAUXCTL_E32B) == 0) |
| return -EIO; |
| return 0; |
| } |
| |
| /* Block transaction function */ |
| static int i801_block_transaction(struct i801_priv *priv, |
| union i2c_smbus_data *data, char read_write, |
| int command, int hwpec) |
| { |
| int result = 0; |
| unsigned char hostc; |
| |
| if (command == I2C_SMBUS_I2C_BLOCK_DATA) { |
| if (read_write == I2C_SMBUS_WRITE) { |
| /* set I2C_EN bit in configuration register */ |
| pci_read_config_byte(priv->pci_dev, SMBHSTCFG, &hostc); |
| pci_write_config_byte(priv->pci_dev, SMBHSTCFG, |
| hostc | SMBHSTCFG_I2C_EN); |
| } else if (!(priv->features & FEATURE_I2C_BLOCK_READ)) { |
| dev_err(&priv->pci_dev->dev, |
| "I2C block read is unsupported!\n"); |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| if (read_write == I2C_SMBUS_WRITE |
| || command == I2C_SMBUS_I2C_BLOCK_DATA) { |
| if (data->block[0] < 1) |
| data->block[0] = 1; |
| if (data->block[0] > I2C_SMBUS_BLOCK_MAX) |
| data->block[0] = I2C_SMBUS_BLOCK_MAX; |
| } else { |
| data->block[0] = 32; /* max for SMBus block reads */ |
| } |
| |
| /* Experience has shown that the block buffer can only be used for |
| SMBus (not I2C) block transactions, even though the datasheet |
| doesn't mention this limitation. */ |
| if ((priv->features & FEATURE_BLOCK_BUFFER) |
| && command != I2C_SMBUS_I2C_BLOCK_DATA |
| && i801_set_block_buffer_mode(priv) == 0) |
| result = i801_block_transaction_by_block(priv, data, |
| read_write, |
| command, hwpec); |
| else |
| result = i801_block_transaction_byte_by_byte(priv, data, |
| read_write, |
| command, hwpec); |
| |
| if (command == I2C_SMBUS_I2C_BLOCK_DATA |
| && read_write == I2C_SMBUS_WRITE) { |
| /* restore saved configuration register value */ |
| pci_write_config_byte(priv->pci_dev, SMBHSTCFG, hostc); |
| } |
| return result; |
| } |
| |
| /* Return negative errno on error. */ |
| static s32 i801_access(struct i2c_adapter *adap, u16 addr, |
| unsigned short flags, char read_write, u8 command, |
| int size, union i2c_smbus_data *data) |
| { |
| int hwpec; |
| int block = 0; |
| int ret = 0, xact = 0; |
| struct i801_priv *priv = i2c_get_adapdata(adap); |
| |
| mutex_lock(&priv->acpi_lock); |
| if (priv->acpi_reserved) { |
| mutex_unlock(&priv->acpi_lock); |
| return -EBUSY; |
| } |
| |
| pm_runtime_get_sync(&priv->pci_dev->dev); |
| |
| hwpec = (priv->features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC) |
| && size != I2C_SMBUS_QUICK |
| && size != I2C_SMBUS_I2C_BLOCK_DATA; |
| |
| switch (size) { |
| case I2C_SMBUS_QUICK: |
| outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| SMBHSTADD(priv)); |
| xact = I801_QUICK; |
| break; |
| case I2C_SMBUS_BYTE: |
| outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| SMBHSTADD(priv)); |
| if (read_write == I2C_SMBUS_WRITE) |
| outb_p(command, SMBHSTCMD(priv)); |
| xact = I801_BYTE; |
| break; |
| case I2C_SMBUS_BYTE_DATA: |
| outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| SMBHSTADD(priv)); |
| outb_p(command, SMBHSTCMD(priv)); |
| if (read_write == I2C_SMBUS_WRITE) |
| outb_p(data->byte, SMBHSTDAT0(priv)); |
| xact = I801_BYTE_DATA; |
| break; |
| case I2C_SMBUS_WORD_DATA: |
| outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| SMBHSTADD(priv)); |
| outb_p(command, SMBHSTCMD(priv)); |
| if (read_write == I2C_SMBUS_WRITE) { |
| outb_p(data->word & 0xff, SMBHSTDAT0(priv)); |
| outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1(priv)); |
| } |
| xact = I801_WORD_DATA; |
| break; |
| case I2C_SMBUS_BLOCK_DATA: |
| outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| SMBHSTADD(priv)); |
| outb_p(command, SMBHSTCMD(priv)); |
| block = 1; |
| break; |
| case I2C_SMBUS_I2C_BLOCK_DATA: |
| /* |
| * NB: page 240 of ICH5 datasheet shows that the R/#W |
| * bit should be cleared here, even when reading. |
| * However if SPD Write Disable is set (Lynx Point and later), |
| * the read will fail if we don't set the R/#W bit. |
| */ |
| outb_p(((addr & 0x7f) << 1) | |
| ((priv->original_hstcfg & SMBHSTCFG_SPD_WD) ? |
| (read_write & 0x01) : 0), |
| SMBHSTADD(priv)); |
| if (read_write == I2C_SMBUS_READ) { |
| /* NB: page 240 of ICH5 datasheet also shows |
| * that DATA1 is the cmd field when reading */ |
| outb_p(command, SMBHSTDAT1(priv)); |
| } else |
| outb_p(command, SMBHSTCMD(priv)); |
| block = 1; |
| break; |
| case I2C_SMBUS_BLOCK_PROC_CALL: |
| /* |
| * Bit 0 of the slave address register always indicate a write |
| * command. |
| */ |
| outb_p((addr & 0x7f) << 1, SMBHSTADD(priv)); |
| outb_p(command, SMBHSTCMD(priv)); |
| block = 1; |
| break; |
| default: |
| dev_err(&priv->pci_dev->dev, "Unsupported transaction %d\n", |
| size); |
| ret = -EOPNOTSUPP; |
| goto out; |
| } |
| |
| if (hwpec) /* enable/disable hardware PEC */ |
| outb_p(inb_p(SMBAUXCTL(priv)) | SMBAUXCTL_CRC, SMBAUXCTL(priv)); |
| else |
| outb_p(inb_p(SMBAUXCTL(priv)) & (~SMBAUXCTL_CRC), |
| SMBAUXCTL(priv)); |
| |
| if (block) |
| ret = i801_block_transaction(priv, data, read_write, size, |
| hwpec); |
| else |
| ret = i801_transaction(priv, xact); |
| |
| /* Some BIOSes don't like it when PEC is enabled at reboot or resume |
| time, so we forcibly disable it after every transaction. Turn off |
| E32B for the same reason. */ |
| if (hwpec || block) |
| outb_p(inb_p(SMBAUXCTL(priv)) & |
| ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), SMBAUXCTL(priv)); |
| |
| if (block) |
| goto out; |
| if (ret) |
| goto out; |
| if ((read_write == I2C_SMBUS_WRITE) || (xact == I801_QUICK)) |
| goto out; |
| |
| switch (xact & 0x7f) { |
| case I801_BYTE: /* Result put in SMBHSTDAT0 */ |
| case I801_BYTE_DATA: |
| data->byte = inb_p(SMBHSTDAT0(priv)); |
| break; |
| case I801_WORD_DATA: |
| data->word = inb_p(SMBHSTDAT0(priv)) + |
| (inb_p(SMBHSTDAT1(priv)) << 8); |
| break; |
| } |
| |
| out: |
| pm_runtime_mark_last_busy(&priv->pci_dev->dev); |
| pm_runtime_put_autosuspend(&priv->pci_dev->dev); |
| mutex_unlock(&priv->acpi_lock); |
| return ret; |
| } |
| |
| |
| static u32 i801_func(struct i2c_adapter *adapter) |
| { |
| struct i801_priv *priv = i2c_get_adapdata(adapter); |
| |
| return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | |
| I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | |
| I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK | |
| ((priv->features & FEATURE_SMBUS_PEC) ? I2C_FUNC_SMBUS_PEC : 0) | |
| ((priv->features & FEATURE_BLOCK_PROC) ? |
| I2C_FUNC_SMBUS_BLOCK_PROC_CALL : 0) | |
| ((priv->features & FEATURE_I2C_BLOCK_READ) ? |
| I2C_FUNC_SMBUS_READ_I2C_BLOCK : 0) | |
| ((priv->features & FEATURE_HOST_NOTIFY) ? |
| I2C_FUNC_SMBUS_HOST_NOTIFY : 0); |
| } |
| |
| static void i801_enable_host_notify(struct i2c_adapter *adapter) |
| { |
| struct i801_priv *priv = i2c_get_adapdata(adapter); |
| |
| if (!(priv->features & FEATURE_HOST_NOTIFY)) |
| return; |
| |
| if (!(SMBSLVCMD_HST_NTFY_INTREN & priv->original_slvcmd)) |
| outb_p(SMBSLVCMD_HST_NTFY_INTREN | priv->original_slvcmd, |
| SMBSLVCMD(priv)); |
| |
| /* clear Host Notify bit to allow a new notification */ |
| outb_p(SMBSLVSTS_HST_NTFY_STS, SMBSLVSTS(priv)); |
| } |
| |
| static void i801_disable_host_notify(struct i801_priv *priv) |
| { |
| if (!(priv->features & FEATURE_HOST_NOTIFY)) |
| return; |
| |
| outb_p(priv->original_slvcmd, SMBSLVCMD(priv)); |
| } |
| |
| static const struct i2c_algorithm smbus_algorithm = { |
| .smbus_xfer = i801_access, |
| .functionality = i801_func, |
| }; |
| |
| static const struct pci_device_id i801_ids[] = { |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_3) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_3) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_2) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_3) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_3) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_3) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_4) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_16) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_17) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_17) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_5) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_6) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EP80579_1) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_4) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_5) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_AVOTON_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS0) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COLETOCREEK_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_GEMINILAKE_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WILDCATPOINT_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BAYTRAIL_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BRASWELL_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CDF_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_DNV_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BROXTON_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CANNONLAKE_H_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CANNONLAKE_LP_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICELAKE_LP_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COMETLAKE_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ELKHART_LAKE_SMBUS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TIGERLAKE_LP_SMBUS) }, |
| { 0, } |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, i801_ids); |
| |
| #if defined CONFIG_X86 && defined CONFIG_DMI |
| static unsigned char apanel_addr; |
| |
| /* Scan the system ROM for the signature "FJKEYINF" */ |
| static __init const void __iomem *bios_signature(const void __iomem *bios) |
| { |
| ssize_t offset; |
| const unsigned char signature[] = "FJKEYINF"; |
| |
| for (offset = 0; offset < 0x10000; offset += 0x10) { |
| if (check_signature(bios + offset, signature, |
| sizeof(signature)-1)) |
| return bios + offset; |
| } |
| return NULL; |
| } |
| |
| static void __init input_apanel_init(void) |
| { |
| void __iomem *bios; |
| const void __iomem *p; |
| |
| bios = ioremap(0xF0000, 0x10000); /* Can't fail */ |
| p = bios_signature(bios); |
| if (p) { |
| /* just use the first address */ |
| apanel_addr = readb(p + 8 + 3) >> 1; |
| } |
| iounmap(bios); |
| } |
| |
| struct dmi_onboard_device_info { |
| const char *name; |
| u8 type; |
| unsigned short i2c_addr; |
| const char *i2c_type; |
| }; |
| |
| static const struct dmi_onboard_device_info dmi_devices[] = { |
| { "Syleus", DMI_DEV_TYPE_OTHER, 0x73, "fscsyl" }, |
| { "Hermes", DMI_DEV_TYPE_OTHER, 0x73, "fscher" }, |
| { "Hades", DMI_DEV_TYPE_OTHER, 0x73, "fschds" }, |
| }; |
| |
| static void dmi_check_onboard_device(u8 type, const char *name, |
| struct i2c_adapter *adap) |
| { |
| int i; |
| struct i2c_board_info info; |
| |
| for (i = 0; i < ARRAY_SIZE(dmi_devices); i++) { |
| /* & ~0x80, ignore enabled/disabled bit */ |
| if ((type & ~0x80) != dmi_devices[i].type) |
| continue; |
| if (strcasecmp(name, dmi_devices[i].name)) |
| continue; |
| |
| memset(&info, 0, sizeof(struct i2c_board_info)); |
| info.addr = dmi_devices[i].i2c_addr; |
| strlcpy(info.type, dmi_devices[i].i2c_type, I2C_NAME_SIZE); |
| i2c_new_device(adap, &info); |
| break; |
| } |
| } |
| |
| /* We use our own function to check for onboard devices instead of |
| dmi_find_device() as some buggy BIOS's have the devices we are interested |
| in marked as disabled */ |
| static void dmi_check_onboard_devices(const struct dmi_header *dm, void *adap) |
| { |
| int i, count; |
| |
| if (dm->type != 10) |
| return; |
| |
| count = (dm->length - sizeof(struct dmi_header)) / 2; |
| for (i = 0; i < count; i++) { |
| const u8 *d = (char *)(dm + 1) + (i * 2); |
| const char *name = ((char *) dm) + dm->length; |
| u8 type = d[0]; |
| u8 s = d[1]; |
| |
| if (!s) |
| continue; |
| s--; |
| while (s > 0 && name[0]) { |
| name += strlen(name) + 1; |
| s--; |
| } |
| if (name[0] == 0) /* Bogus string reference */ |
| continue; |
| |
| dmi_check_onboard_device(type, name, adap); |
| } |
| } |
| |
| /* NOTE: Keep this list in sync with drivers/platform/x86/dell-smo8800.c */ |
| static const char *const acpi_smo8800_ids[] = { |
| "SMO8800", |
| "SMO8801", |
| "SMO8810", |
| "SMO8811", |
| "SMO8820", |
| "SMO8821", |
| "SMO8830", |
| "SMO8831", |
| }; |
| |
| static acpi_status check_acpi_smo88xx_device(acpi_handle obj_handle, |
| u32 nesting_level, |
| void *context, |
| void **return_value) |
| { |
| struct acpi_device_info *info; |
| acpi_status status; |
| char *hid; |
| int i; |
| |
| status = acpi_get_object_info(obj_handle, &info); |
| if (ACPI_FAILURE(status)) |
| return AE_OK; |
| |
| if (!(info->valid & ACPI_VALID_HID)) |
| goto smo88xx_not_found; |
| |
| hid = info->hardware_id.string; |
| if (!hid) |
| goto smo88xx_not_found; |
| |
| i = match_string(acpi_smo8800_ids, ARRAY_SIZE(acpi_smo8800_ids), hid); |
| if (i < 0) |
| goto smo88xx_not_found; |
| |
| kfree(info); |
| |
| *((bool *)return_value) = true; |
| return AE_CTRL_TERMINATE; |
| |
| smo88xx_not_found: |
| kfree(info); |
| return AE_OK; |
| } |
| |
| static bool is_dell_system_with_lis3lv02d(void) |
| { |
| bool found; |
| const char *vendor; |
| |
| vendor = dmi_get_system_info(DMI_SYS_VENDOR); |
| if (!vendor || strcmp(vendor, "Dell Inc.")) |
| return false; |
| |
| /* |
| * Check that ACPI device SMO88xx is present and is functioning. |
| * Function acpi_get_devices() already filters all ACPI devices |
| * which are not present or are not functioning. |
| * ACPI device SMO88xx represents our ST microelectronics lis3lv02d |
| * accelerometer but unfortunately ACPI does not provide any other |
| * information (like I2C address). |
| */ |
| found = false; |
| acpi_get_devices(NULL, check_acpi_smo88xx_device, NULL, |
| (void **)&found); |
| |
| return found; |
| } |
| |
| /* |
| * Accelerometer's I2C address is not specified in DMI nor ACPI, |
| * so it is needed to define mapping table based on DMI product names. |
| */ |
| static const struct { |
| const char *dmi_product_name; |
| unsigned short i2c_addr; |
| } dell_lis3lv02d_devices[] = { |
| /* |
| * Dell platform team told us that these Latitude devices have |
| * ST microelectronics accelerometer at I2C address 0x29. |
| */ |
| { "Latitude E5250", 0x29 }, |
| { "Latitude E5450", 0x29 }, |
| { "Latitude E5550", 0x29 }, |
| { "Latitude E6440", 0x29 }, |
| { "Latitude E6440 ATG", 0x29 }, |
| { "Latitude E6540", 0x29 }, |
| /* |
| * Additional individual entries were added after verification. |
| */ |
| { "Vostro V131", 0x1d }, |
| }; |
| |
| static void register_dell_lis3lv02d_i2c_device(struct i801_priv *priv) |
| { |
| struct i2c_board_info info; |
| const char *dmi_product_name; |
| int i; |
| |
| dmi_product_name = dmi_get_system_info(DMI_PRODUCT_NAME); |
| for (i = 0; i < ARRAY_SIZE(dell_lis3lv02d_devices); ++i) { |
| if (strcmp(dmi_product_name, |
| dell_lis3lv02d_devices[i].dmi_product_name) == 0) |
| break; |
| } |
| |
| if (i == ARRAY_SIZE(dell_lis3lv02d_devices)) { |
| dev_warn(&priv->pci_dev->dev, |
| "Accelerometer lis3lv02d is present on SMBus but its" |
| " address is unknown, skipping registration\n"); |
| return; |
| } |
| |
| memset(&info, 0, sizeof(struct i2c_board_info)); |
| info.addr = dell_lis3lv02d_devices[i].i2c_addr; |
| strlcpy(info.type, "lis3lv02d", I2C_NAME_SIZE); |
| i2c_new_device(&priv->adapter, &info); |
| } |
| |
| /* Register optional slaves */ |
| static void i801_probe_optional_slaves(struct i801_priv *priv) |
| { |
| /* Only register slaves on main SMBus channel */ |
| if (priv->features & FEATURE_IDF) |
| return; |
| |
| if (apanel_addr) { |
| struct i2c_board_info info; |
| |
| memset(&info, 0, sizeof(struct i2c_board_info)); |
| info.addr = apanel_addr; |
| strlcpy(info.type, "fujitsu_apanel", I2C_NAME_SIZE); |
| i2c_new_device(&priv->adapter, &info); |
| } |
| |
| if (dmi_name_in_vendors("FUJITSU")) |
| dmi_walk(dmi_check_onboard_devices, &priv->adapter); |
| |
| if (is_dell_system_with_lis3lv02d()) |
| register_dell_lis3lv02d_i2c_device(priv); |
| } |
| #else |
| static void __init input_apanel_init(void) {} |
| static void i801_probe_optional_slaves(struct i801_priv *priv) {} |
| #endif /* CONFIG_X86 && CONFIG_DMI */ |
| |
| #if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI |
| static struct i801_mux_config i801_mux_config_asus_z8_d12 = { |
| .gpio_chip = "gpio_ich", |
| .values = { 0x02, 0x03 }, |
| .n_values = 2, |
| .classes = { I2C_CLASS_SPD, I2C_CLASS_SPD }, |
| .gpios = { 52, 53 }, |
| .n_gpios = 2, |
| }; |
| |
| static struct i801_mux_config i801_mux_config_asus_z8_d18 = { |
| .gpio_chip = "gpio_ich", |
| .values = { 0x02, 0x03, 0x01 }, |
| .n_values = 3, |
| .classes = { I2C_CLASS_SPD, I2C_CLASS_SPD, I2C_CLASS_SPD }, |
| .gpios = { 52, 53 }, |
| .n_gpios = 2, |
| }; |
| |
| static const struct dmi_system_id mux_dmi_table[] = { |
| { |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "Z8NA-D6(C)"), |
| }, |
| .driver_data = &i801_mux_config_asus_z8_d12, |
| }, |
| { |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "Z8P(N)E-D12(X)"), |
| }, |
| .driver_data = &i801_mux_config_asus_z8_d12, |
| }, |
| { |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "Z8NH-D12"), |
| }, |
| .driver_data = &i801_mux_config_asus_z8_d12, |
| }, |
| { |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "Z8PH-D12/IFB"), |
| }, |
| .driver_data = &i801_mux_config_asus_z8_d12, |
| }, |
| { |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "Z8NR-D12"), |
| }, |
| .driver_data = &i801_mux_config_asus_z8_d12, |
| }, |
| { |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "Z8P(N)H-D12"), |
| }, |
| .driver_data = &i801_mux_config_asus_z8_d12, |
| }, |
| { |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "Z8PG-D18"), |
| }, |
| .driver_data = &i801_mux_config_asus_z8_d18, |
| }, |
| { |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "Z8PE-D18"), |
| }, |
| .driver_data = &i801_mux_config_asus_z8_d18, |
| }, |
| { |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "Z8PS-D12"), |
| }, |
| .driver_data = &i801_mux_config_asus_z8_d12, |
| }, |
| { } |
| }; |
| |
| /* Setup multiplexing if needed */ |
| static int i801_add_mux(struct i801_priv *priv) |
| { |
| struct device *dev = &priv->adapter.dev; |
| const struct i801_mux_config *mux_config; |
| struct i2c_mux_gpio_platform_data gpio_data; |
| struct gpiod_lookup_table *lookup; |
| int err, i; |
| |
| if (!priv->mux_drvdata) |
| return 0; |
| mux_config = priv->mux_drvdata; |
| |
| /* Prepare the platform data */ |
| memset(&gpio_data, 0, sizeof(struct i2c_mux_gpio_platform_data)); |
| gpio_data.parent = priv->adapter.nr; |
| gpio_data.values = mux_config->values; |
| gpio_data.n_values = mux_config->n_values; |
| gpio_data.classes = mux_config->classes; |
| gpio_data.idle = I2C_MUX_GPIO_NO_IDLE; |
| |
| /* Register GPIO descriptor lookup table */ |
| lookup = devm_kzalloc(dev, |
| struct_size(lookup, table, mux_config->n_gpios), |
| GFP_KERNEL); |
| if (!lookup) |
| return -ENOMEM; |
| lookup->dev_id = "i2c-mux-gpio"; |
| for (i = 0; i < mux_config->n_gpios; i++) { |
| lookup->table[i].chip_label = mux_config->gpio_chip; |
| lookup->table[i].chip_hwnum = mux_config->gpios[i]; |
| lookup->table[i].con_id = "mux"; |
| } |
| gpiod_add_lookup_table(lookup); |
| priv->lookup = lookup; |
| |
| /* |
| * Register the mux device, we use PLATFORM_DEVID_NONE here |
| * because since we are referring to the GPIO chip by name we are |
| * anyways in deep trouble if there is more than one of these |
| * devices, and there should likely only be one platform controller |
| * hub. |
| */ |
| priv->mux_pdev = platform_device_register_data(dev, "i2c-mux-gpio", |
| PLATFORM_DEVID_NONE, &gpio_data, |
| sizeof(struct i2c_mux_gpio_platform_data)); |
| if (IS_ERR(priv->mux_pdev)) { |
| err = PTR_ERR(priv->mux_pdev); |
| gpiod_remove_lookup_table(lookup); |
| priv->mux_pdev = NULL; |
| dev_err(dev, "Failed to register i2c-mux-gpio device\n"); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static void i801_del_mux(struct i801_priv *priv) |
| { |
| if (priv->mux_pdev) |
| platform_device_unregister(priv->mux_pdev); |
| if (priv->lookup) |
| gpiod_remove_lookup_table(priv->lookup); |
| } |
| |
| static unsigned int i801_get_adapter_class(struct i801_priv *priv) |
| { |
| const struct dmi_system_id *id; |
| const struct i801_mux_config *mux_config; |
| unsigned int class = I2C_CLASS_HWMON | I2C_CLASS_SPD; |
| int i; |
| |
| id = dmi_first_match(mux_dmi_table); |
| if (id) { |
| /* Remove branch classes from trunk */ |
| mux_config = id->driver_data; |
| for (i = 0; i < mux_config->n_values; i++) |
| class &= ~mux_config->classes[i]; |
| |
| /* Remember for later */ |
| priv->mux_drvdata = mux_config; |
| } |
| |
| return class; |
| } |
| #else |
| static inline int i801_add_mux(struct i801_priv *priv) { return 0; } |
| static inline void i801_del_mux(struct i801_priv *priv) { } |
| |
| static inline unsigned int i801_get_adapter_class(struct i801_priv *priv) |
| { |
| return I2C_CLASS_HWMON | I2C_CLASS_SPD; |
| } |
| #endif |
| |
| static const struct itco_wdt_platform_data spt_tco_platform_data = { |
| .name = "Intel PCH", |
| .version = 4, |
| }; |
| |
| static DEFINE_SPINLOCK(p2sb_spinlock); |
| |
| static struct platform_device * |
| i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev, |
| struct resource *tco_res) |
| { |
| struct resource *res; |
| unsigned int devfn; |
| u64 base64_addr; |
| u32 base_addr; |
| u8 hidden; |
| |
| /* |
| * We must access the NO_REBOOT bit over the Primary to Sideband |
| * bridge (P2SB). The BIOS prevents the P2SB device from being |
| * enumerated by the PCI subsystem, so we need to unhide/hide it |
| * to lookup the P2SB BAR. |
| */ |
| spin_lock(&p2sb_spinlock); |
| |
| devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 1); |
| |
| /* Unhide the P2SB device, if it is hidden */ |
| pci_bus_read_config_byte(pci_dev->bus, devfn, 0xe1, &hidden); |
| if (hidden) |
| pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x0); |
| |
| pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR, &base_addr); |
| base64_addr = base_addr & 0xfffffff0; |
| |
| pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR + 0x4, &base_addr); |
| base64_addr |= (u64)base_addr << 32; |
| |
| /* Hide the P2SB device, if it was hidden before */ |
| if (hidden) |
| pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, hidden); |
| spin_unlock(&p2sb_spinlock); |
| |
| res = &tco_res[ICH_RES_MEM_OFF]; |
| if (pci_dev->device == PCI_DEVICE_ID_INTEL_DNV_SMBUS) |
| res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL_DNV; |
| else |
| res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL; |
| |
| res->end = res->start + 3; |
| res->flags = IORESOURCE_MEM; |
| |
| return platform_device_register_resndata(&pci_dev->dev, "iTCO_wdt", -1, |
| tco_res, 3, &spt_tco_platform_data, |
| sizeof(spt_tco_platform_data)); |
| } |
| |
| static const struct itco_wdt_platform_data cnl_tco_platform_data = { |
| .name = "Intel PCH", |
| .version = 6, |
| }; |
| |
| static struct platform_device * |
| i801_add_tco_cnl(struct i801_priv *priv, struct pci_dev *pci_dev, |
| struct resource *tco_res) |
| { |
| return platform_device_register_resndata(&pci_dev->dev, "iTCO_wdt", -1, |
| tco_res, 2, &cnl_tco_platform_data, |
| sizeof(cnl_tco_platform_data)); |
| } |
| |
| static void i801_add_tco(struct i801_priv *priv) |
| { |
| u32 base_addr, tco_base, tco_ctl, ctrl_val; |
| struct pci_dev *pci_dev = priv->pci_dev; |
| struct resource tco_res[3], *res; |
| unsigned int devfn; |
| |
| /* If we have ACPI based watchdog use that instead */ |
| if (acpi_has_watchdog()) |
| return; |
| |
| if (!(priv->features & (FEATURE_TCO_SPT | FEATURE_TCO_CNL))) |
| return; |
| |
| pci_read_config_dword(pci_dev, TCOBASE, &tco_base); |
| pci_read_config_dword(pci_dev, TCOCTL, &tco_ctl); |
| if (!(tco_ctl & TCOCTL_EN)) |
| return; |
| |
| memset(tco_res, 0, sizeof(tco_res)); |
| |
| res = &tco_res[ICH_RES_IO_TCO]; |
| res->start = tco_base & ~1; |
| res->end = res->start + 32 - 1; |
| res->flags = IORESOURCE_IO; |
| |
| /* |
| * Power Management registers. |
| */ |
| devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 2); |
| pci_bus_read_config_dword(pci_dev->bus, devfn, ACPIBASE, &base_addr); |
| |
| res = &tco_res[ICH_RES_IO_SMI]; |
| res->start = (base_addr & ~1) + ACPIBASE_SMI_OFF; |
| res->end = res->start + 3; |
| res->flags = IORESOURCE_IO; |
| |
| /* |
| * Enable the ACPI I/O space. |
| */ |
| pci_bus_read_config_dword(pci_dev->bus, devfn, ACPICTRL, &ctrl_val); |
| ctrl_val |= ACPICTRL_EN; |
| pci_bus_write_config_dword(pci_dev->bus, devfn, ACPICTRL, ctrl_val); |
| |
| if (priv->features & FEATURE_TCO_CNL) |
| priv->tco_pdev = i801_add_tco_cnl(priv, pci_dev, tco_res); |
| else |
| priv->tco_pdev = i801_add_tco_spt(priv, pci_dev, tco_res); |
| |
| if (IS_ERR(priv->tco_pdev)) |
| dev_warn(&pci_dev->dev, "failed to create iTCO device\n"); |
| } |
| |
| #ifdef CONFIG_ACPI |
| static bool i801_acpi_is_smbus_ioport(const struct i801_priv *priv, |
| acpi_physical_address address) |
| { |
| return address >= priv->smba && |
| address <= pci_resource_end(priv->pci_dev, SMBBAR); |
| } |
| |
| static acpi_status |
| i801_acpi_io_handler(u32 function, acpi_physical_address address, u32 bits, |
| u64 *value, void *handler_context, void *region_context) |
| { |
| struct i801_priv *priv = handler_context; |
| struct pci_dev *pdev = priv->pci_dev; |
| acpi_status status; |
| |
| /* |
| * Once BIOS AML code touches the OpRegion we warn and inhibit any |
| * further access from the driver itself. This device is now owned |
| * by the system firmware. |
| */ |
| mutex_lock(&priv->acpi_lock); |
| |
| if (!priv->acpi_reserved && i801_acpi_is_smbus_ioport(priv, address)) { |
| priv->acpi_reserved = true; |
| |
| dev_warn(&pdev->dev, "BIOS is accessing SMBus registers\n"); |
| dev_warn(&pdev->dev, "Driver SMBus register access inhibited\n"); |
| |
| /* |
| * BIOS is accessing the host controller so prevent it from |
| * suspending automatically from now on. |
| */ |
| pm_runtime_get_sync(&pdev->dev); |
| } |
| |
| if ((function & ACPI_IO_MASK) == ACPI_READ) |
| status = acpi_os_read_port(address, (u32 *)value, bits); |
| else |
| status = acpi_os_write_port(address, (u32)*value, bits); |
| |
| mutex_unlock(&priv->acpi_lock); |
| |
| return status; |
| } |
| |
| static int i801_acpi_probe(struct i801_priv *priv) |
| { |
| struct acpi_device *adev; |
| acpi_status status; |
| |
| adev = ACPI_COMPANION(&priv->pci_dev->dev); |
| if (adev) { |
| status = acpi_install_address_space_handler(adev->handle, |
| ACPI_ADR_SPACE_SYSTEM_IO, i801_acpi_io_handler, |
| NULL, priv); |
| if (ACPI_SUCCESS(status)) |
| return 0; |
| } |
| |
| return acpi_check_resource_conflict(&priv->pci_dev->resource[SMBBAR]); |
| } |
| |
| static void i801_acpi_remove(struct i801_priv *priv) |
| { |
| struct acpi_device *adev; |
| |
| adev = ACPI_COMPANION(&priv->pci_dev->dev); |
| if (!adev) |
| return; |
| |
| acpi_remove_address_space_handler(adev->handle, |
| ACPI_ADR_SPACE_SYSTEM_IO, i801_acpi_io_handler); |
| |
| mutex_lock(&priv->acpi_lock); |
| if (priv->acpi_reserved) |
| pm_runtime_put(&priv->pci_dev->dev); |
| mutex_unlock(&priv->acpi_lock); |
| } |
| #else |
| static inline int i801_acpi_probe(struct i801_priv *priv) { return 0; } |
| static inline void i801_acpi_remove(struct i801_priv *priv) { } |
| #endif |
| |
| static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id) |
| { |
| unsigned char temp; |
| int err, i; |
| struct i801_priv *priv; |
| |
| priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL); |
| if (!priv) |
| return -ENOMEM; |
| |
| i2c_set_adapdata(&priv->adapter, priv); |
| priv->adapter.owner = THIS_MODULE; |
| priv->adapter.class = i801_get_adapter_class(priv); |
| priv->adapter.algo = &smbus_algorithm; |
| priv->adapter.dev.parent = &dev->dev; |
| ACPI_COMPANION_SET(&priv->adapter.dev, ACPI_COMPANION(&dev->dev)); |
| priv->adapter.retries = 3; |
| mutex_init(&priv->acpi_lock); |
| |
| priv->pci_dev = dev; |
| switch (dev->device) { |
| case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS: |
| case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS: |
| case PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS: |
| case PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS: |
| case PCI_DEVICE_ID_INTEL_DNV_SMBUS: |
| case PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS: |
| priv->features |= FEATURE_BLOCK_PROC; |
| priv->features |= FEATURE_I2C_BLOCK_READ; |
| priv->features |= FEATURE_IRQ; |
| priv->features |= FEATURE_SMBUS_PEC; |
| priv->features |= FEATURE_BLOCK_BUFFER; |
| priv->features |= FEATURE_TCO_SPT; |
| priv->features |= FEATURE_HOST_NOTIFY; |
| break; |
| |
| case PCI_DEVICE_ID_INTEL_CANNONLAKE_H_SMBUS: |
| case PCI_DEVICE_ID_INTEL_CANNONLAKE_LP_SMBUS: |
| case PCI_DEVICE_ID_INTEL_CDF_SMBUS: |
| case PCI_DEVICE_ID_INTEL_ICELAKE_LP_SMBUS: |
| case PCI_DEVICE_ID_INTEL_COMETLAKE_SMBUS: |
| case PCI_DEVICE_ID_INTEL_ELKHART_LAKE_SMBUS: |
| case PCI_DEVICE_ID_INTEL_TIGERLAKE_LP_SMBUS: |
| priv->features |= FEATURE_BLOCK_PROC; |
| priv->features |= FEATURE_I2C_BLOCK_READ; |
| priv->features |= FEATURE_IRQ; |
| priv->features |= FEATURE_SMBUS_PEC; |
| priv->features |= FEATURE_BLOCK_BUFFER; |
| priv->features |= FEATURE_TCO_CNL; |
| priv->features |= FEATURE_HOST_NOTIFY; |
| break; |
| |
| case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0: |
| case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1: |
| case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2: |
| case PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS0: |
| case PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1: |
| case PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2: |
| priv->features |= FEATURE_IDF; |
| /* fall through */ |
| default: |
| priv->features |= FEATURE_BLOCK_PROC; |
| priv->features |= FEATURE_I2C_BLOCK_READ; |
| priv->features |= FEATURE_IRQ; |
| /* fall through */ |
| case PCI_DEVICE_ID_INTEL_82801DB_3: |
| priv->features |= FEATURE_SMBUS_PEC; |
| priv->features |= FEATURE_BLOCK_BUFFER; |
| /* fall through */ |
| case PCI_DEVICE_ID_INTEL_82801CA_3: |
| priv->features |= FEATURE_HOST_NOTIFY; |
| /* fall through */ |
| case PCI_DEVICE_ID_INTEL_82801BA_2: |
| case PCI_DEVICE_ID_INTEL_82801AB_3: |
| case PCI_DEVICE_ID_INTEL_82801AA_3: |
| break; |
| } |
| |
| /* Disable features on user request */ |
| for (i = 0; i < ARRAY_SIZE(i801_feature_names); i++) { |
| if (priv->features & disable_features & (1 << i)) |
| dev_notice(&dev->dev, "%s disabled by user\n", |
| i801_feature_names[i]); |
| } |
| priv->features &= ~disable_features; |
| |
| err = pcim_enable_device(dev); |
| if (err) { |
| dev_err(&dev->dev, "Failed to enable SMBus PCI device (%d)\n", |
| err); |
| return err; |
| } |
| pcim_pin_device(dev); |
| |
| /* Determine the address of the SMBus area */ |
| priv->smba = pci_resource_start(dev, SMBBAR); |
| if (!priv->smba) { |
| dev_err(&dev->dev, |
| "SMBus base address uninitialized, upgrade BIOS\n"); |
| return -ENODEV; |
| } |
| |
| if (i801_acpi_probe(priv)) |
| return -ENODEV; |
| |
| err = pcim_iomap_regions(dev, 1 << SMBBAR, |
| dev_driver_string(&dev->dev)); |
| if (err) { |
| dev_err(&dev->dev, |
| "Failed to request SMBus region 0x%lx-0x%Lx\n", |
| priv->smba, |
| (unsigned long long)pci_resource_end(dev, SMBBAR)); |
| i801_acpi_remove(priv); |
| return err; |
| } |
| |
| pci_read_config_byte(priv->pci_dev, SMBHSTCFG, &temp); |
| priv->original_hstcfg = temp; |
| temp &= ~SMBHSTCFG_I2C_EN; /* SMBus timing */ |
| if (!(temp & SMBHSTCFG_HST_EN)) { |
| dev_info(&dev->dev, "Enabling SMBus device\n"); |
| temp |= SMBHSTCFG_HST_EN; |
| } |
| pci_write_config_byte(priv->pci_dev, SMBHSTCFG, temp); |
| |
| if (temp & SMBHSTCFG_SMB_SMI_EN) { |
| dev_dbg(&dev->dev, "SMBus using interrupt SMI#\n"); |
| /* Disable SMBus interrupt feature if SMBus using SMI# */ |
| priv->features &= ~FEATURE_IRQ; |
| } |
| if (temp & SMBHSTCFG_SPD_WD) |
| dev_info(&dev->dev, "SPD Write Disable is set\n"); |
| |
| /* Clear special mode bits */ |
| if (priv->features & (FEATURE_SMBUS_PEC | FEATURE_BLOCK_BUFFER)) |
| outb_p(inb_p(SMBAUXCTL(priv)) & |
| ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), SMBAUXCTL(priv)); |
| |
| /* Remember original Host Notify setting */ |
| if (priv->features & FEATURE_HOST_NOTIFY) |
| priv->original_slvcmd = inb_p(SMBSLVCMD(priv)); |
| |
| /* Default timeout in interrupt mode: 200 ms */ |
| priv->adapter.timeout = HZ / 5; |
| |
| if (dev->irq == IRQ_NOTCONNECTED) |
| priv->features &= ~FEATURE_IRQ; |
| |
| if (priv->features & FEATURE_IRQ) { |
| u16 pcictl, pcists; |
| |
| /* Complain if an interrupt is already pending */ |
| pci_read_config_word(priv->pci_dev, SMBPCISTS, &pcists); |
| if (pcists & SMBPCISTS_INTS) |
| dev_warn(&dev->dev, "An interrupt is pending!\n"); |
| |
| /* Check if interrupts have been disabled */ |
| pci_read_config_word(priv->pci_dev, SMBPCICTL, &pcictl); |
| if (pcictl & SMBPCICTL_INTDIS) { |
| dev_info(&dev->dev, "Interrupts are disabled\n"); |
| priv->features &= ~FEATURE_IRQ; |
| } |
| } |
| |
| if (priv->features & FEATURE_IRQ) { |
| init_waitqueue_head(&priv->waitq); |
| |
| err = devm_request_irq(&dev->dev, dev->irq, i801_isr, |
| IRQF_SHARED, |
| dev_driver_string(&dev->dev), priv); |
| if (err) { |
| dev_err(&dev->dev, "Failed to allocate irq %d: %d\n", |
| dev->irq, err); |
| priv->features &= ~FEATURE_IRQ; |
| } |
| } |
| dev_info(&dev->dev, "SMBus using %s\n", |
| priv->features & FEATURE_IRQ ? "PCI interrupt" : "polling"); |
| |
| i801_add_tco(priv); |
| |
| snprintf(priv->adapter.name, sizeof(priv->adapter.name), |
| "SMBus I801 adapter at %04lx", priv->smba); |
| err = i2c_add_adapter(&priv->adapter); |
| if (err) { |
| i801_acpi_remove(priv); |
| return err; |
| } |
| |
| i801_enable_host_notify(&priv->adapter); |
| |
| i801_probe_optional_slaves(priv); |
| /* We ignore errors - multiplexing is optional */ |
| i801_add_mux(priv); |
| |
| pci_set_drvdata(dev, priv); |
| |
| pm_runtime_set_autosuspend_delay(&dev->dev, 1000); |
| pm_runtime_use_autosuspend(&dev->dev); |
| pm_runtime_put_autosuspend(&dev->dev); |
| pm_runtime_allow(&dev->dev); |
| |
| return 0; |
| } |
| |
| static void i801_remove(struct pci_dev *dev) |
| { |
| struct i801_priv *priv = pci_get_drvdata(dev); |
| |
| pm_runtime_forbid(&dev->dev); |
| pm_runtime_get_noresume(&dev->dev); |
| |
| i801_disable_host_notify(priv); |
| i801_del_mux(priv); |
| i2c_del_adapter(&priv->adapter); |
| i801_acpi_remove(priv); |
| pci_write_config_byte(dev, SMBHSTCFG, priv->original_hstcfg); |
| |
| platform_device_unregister(priv->tco_pdev); |
| |
| /* |
| * do not call pci_disable_device(dev) since it can cause hard hangs on |
| * some systems during power-off (eg. Fujitsu-Siemens Lifebook E8010) |
| */ |
| } |
| |
| static void i801_shutdown(struct pci_dev *dev) |
| { |
| struct i801_priv *priv = pci_get_drvdata(dev); |
| |
| /* Restore config registers to avoid hard hang on some systems */ |
| i801_disable_host_notify(priv); |
| pci_write_config_byte(dev, SMBHSTCFG, priv->original_hstcfg); |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int i801_suspend(struct device *dev) |
| { |
| struct pci_dev *pci_dev = to_pci_dev(dev); |
| struct i801_priv *priv = pci_get_drvdata(pci_dev); |
| |
| pci_write_config_byte(pci_dev, SMBHSTCFG, priv->original_hstcfg); |
| return 0; |
| } |
| |
| static int i801_resume(struct device *dev) |
| { |
| struct i801_priv *priv = dev_get_drvdata(dev); |
| |
| i801_enable_host_notify(&priv->adapter); |
| |
| return 0; |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(i801_pm_ops, i801_suspend, i801_resume); |
| |
| static struct pci_driver i801_driver = { |
| .name = "i801_smbus", |
| .id_table = i801_ids, |
| .probe = i801_probe, |
| .remove = i801_remove, |
| .shutdown = i801_shutdown, |
| .driver = { |
| .pm = &i801_pm_ops, |
| }, |
| }; |
| |
| static int __init i2c_i801_init(void) |
| { |
| if (dmi_name_in_vendors("FUJITSU")) |
| input_apanel_init(); |
| return pci_register_driver(&i801_driver); |
| } |
| |
| static void __exit i2c_i801_exit(void) |
| { |
| pci_unregister_driver(&i801_driver); |
| } |
| |
| MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>, Jean Delvare <jdelvare@suse.de>"); |
| MODULE_DESCRIPTION("I801 SMBus driver"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(i2c_i801_init); |
| module_exit(i2c_i801_exit); |