diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-amd8111.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/busses/i2c-amd8111.c | 505 |
1 files changed, 0 insertions, 505 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-amd8111.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-amd8111.c deleted file mode 100644 index e5ac53b9..00000000 --- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-amd8111.c +++ /dev/null @@ -1,505 +0,0 @@ -/* - * SMBus 2.0 driver for AMD-8111 IO-Hub. - * - * Copyright (c) 2002 Vojtech Pavlik - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation version 2. - */ - -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/kernel.h> -#include <linux/stddef.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/i2c.h> -#include <linux/delay.h> -#include <linux/acpi.h> -#include <linux/slab.h> -#include <linux/io.h> - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR ("Vojtech Pavlik <vojtech@suse.cz>"); -MODULE_DESCRIPTION("AMD8111 SMBus 2.0 driver"); - -struct amd_smbus { - struct pci_dev *dev; - struct i2c_adapter adapter; - int base; - int size; -}; - -static struct pci_driver amd8111_driver; - -/* - * AMD PCI control registers definitions. - */ - -#define AMD_PCI_MISC 0x48 - -#define AMD_PCI_MISC_SCI 0x04 /* deliver SCI */ -#define AMD_PCI_MISC_INT 0x02 /* deliver PCI IRQ */ -#define AMD_PCI_MISC_SPEEDUP 0x01 /* 16x clock speedup */ - -/* - * ACPI 2.0 chapter 13 PCI interface definitions. - */ - -#define AMD_EC_DATA 0x00 /* data register */ -#define AMD_EC_SC 0x04 /* status of controller */ -#define AMD_EC_CMD 0x04 /* command register */ -#define AMD_EC_ICR 0x08 /* interrupt control register */ - -#define AMD_EC_SC_SMI 0x04 /* smi event pending */ -#define AMD_EC_SC_SCI 0x02 /* sci event pending */ -#define AMD_EC_SC_BURST 0x01 /* burst mode enabled */ -#define AMD_EC_SC_CMD 0x08 /* byte in data reg is command */ -#define AMD_EC_SC_IBF 0x02 /* data ready for embedded controller */ -#define AMD_EC_SC_OBF 0x01 /* data ready for host */ - -#define AMD_EC_CMD_RD 0x80 /* read EC */ -#define AMD_EC_CMD_WR 0x81 /* write EC */ -#define AMD_EC_CMD_BE 0x82 /* enable burst mode */ -#define AMD_EC_CMD_BD 0x83 /* disable burst mode */ -#define AMD_EC_CMD_QR 0x84 /* query EC */ - -/* - * ACPI 2.0 chapter 13 access of registers of the EC - */ - -static int amd_ec_wait_write(struct amd_smbus *smbus) -{ - int timeout = 500; - - while ((inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_IBF) && --timeout) - udelay(1); - - if (!timeout) { - dev_warn(&smbus->dev->dev, - "Timeout while waiting for IBF to clear\n"); - return -ETIMEDOUT; - } - - return 0; -} - -static int amd_ec_wait_read(struct amd_smbus *smbus) -{ - int timeout = 500; - - while ((~inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_OBF) && --timeout) - udelay(1); - - if (!timeout) { - dev_warn(&smbus->dev->dev, - "Timeout while waiting for OBF to set\n"); - return -ETIMEDOUT; - } - - return 0; -} - -static int amd_ec_read(struct amd_smbus *smbus, unsigned char address, - unsigned char *data) -{ - int status; - - status = amd_ec_wait_write(smbus); - if (status) - return status; - outb(AMD_EC_CMD_RD, smbus->base + AMD_EC_CMD); - - status = amd_ec_wait_write(smbus); - if (status) - return status; - outb(address, smbus->base + AMD_EC_DATA); - - status = amd_ec_wait_read(smbus); - if (status) - return status; - *data = inb(smbus->base + AMD_EC_DATA); - - return 0; -} - -static int amd_ec_write(struct amd_smbus *smbus, unsigned char address, - unsigned char data) -{ - int status; - - status = amd_ec_wait_write(smbus); - if (status) - return status; - outb(AMD_EC_CMD_WR, smbus->base + AMD_EC_CMD); - - status = amd_ec_wait_write(smbus); - if (status) - return status; - outb(address, smbus->base + AMD_EC_DATA); - - status = amd_ec_wait_write(smbus); - if (status) - return status; - outb(data, smbus->base + AMD_EC_DATA); - - return 0; -} - -/* - * ACPI 2.0 chapter 13 SMBus 2.0 EC register model - */ - -#define AMD_SMB_PRTCL 0x00 /* protocol, PEC */ -#define AMD_SMB_STS 0x01 /* status */ -#define AMD_SMB_ADDR 0x02 /* address */ -#define AMD_SMB_CMD 0x03 /* command */ -#define AMD_SMB_DATA 0x04 /* 32 data registers */ -#define AMD_SMB_BCNT 0x24 /* number of data bytes */ -#define AMD_SMB_ALRM_A 0x25 /* alarm address */ -#define AMD_SMB_ALRM_D 0x26 /* 2 bytes alarm data */ - -#define AMD_SMB_STS_DONE 0x80 -#define AMD_SMB_STS_ALRM 0x40 -#define AMD_SMB_STS_RES 0x20 -#define AMD_SMB_STS_STATUS 0x1f - -#define AMD_SMB_STATUS_OK 0x00 -#define AMD_SMB_STATUS_FAIL 0x07 -#define AMD_SMB_STATUS_DNAK 0x10 -#define AMD_SMB_STATUS_DERR 0x11 -#define AMD_SMB_STATUS_CMD_DENY 0x12 -#define AMD_SMB_STATUS_UNKNOWN 0x13 -#define AMD_SMB_STATUS_ACC_DENY 0x17 -#define AMD_SMB_STATUS_TIMEOUT 0x18 -#define AMD_SMB_STATUS_NOTSUP 0x19 -#define AMD_SMB_STATUS_BUSY 0x1A -#define AMD_SMB_STATUS_PEC 0x1F - -#define AMD_SMB_PRTCL_WRITE 0x00 -#define AMD_SMB_PRTCL_READ 0x01 -#define AMD_SMB_PRTCL_QUICK 0x02 -#define AMD_SMB_PRTCL_BYTE 0x04 -#define AMD_SMB_PRTCL_BYTE_DATA 0x06 -#define AMD_SMB_PRTCL_WORD_DATA 0x08 -#define AMD_SMB_PRTCL_BLOCK_DATA 0x0a -#define AMD_SMB_PRTCL_PROC_CALL 0x0c -#define AMD_SMB_PRTCL_BLOCK_PROC_CALL 0x0d -#define AMD_SMB_PRTCL_I2C_BLOCK_DATA 0x4a -#define AMD_SMB_PRTCL_PEC 0x80 - - -static s32 amd8111_access(struct i2c_adapter * adap, u16 addr, - unsigned short flags, char read_write, u8 command, int size, - union i2c_smbus_data * data) -{ - struct amd_smbus *smbus = adap->algo_data; - unsigned char protocol, len, pec, temp[2]; - int i, status; - - protocol = (read_write == I2C_SMBUS_READ) ? AMD_SMB_PRTCL_READ - : AMD_SMB_PRTCL_WRITE; - pec = (flags & I2C_CLIENT_PEC) ? AMD_SMB_PRTCL_PEC : 0; - - switch (size) { - case I2C_SMBUS_QUICK: - protocol |= AMD_SMB_PRTCL_QUICK; - read_write = I2C_SMBUS_WRITE; - break; - - case I2C_SMBUS_BYTE: - if (read_write == I2C_SMBUS_WRITE) { - status = amd_ec_write(smbus, AMD_SMB_CMD, - command); - if (status) - return status; - } - protocol |= AMD_SMB_PRTCL_BYTE; - break; - - case I2C_SMBUS_BYTE_DATA: - status = amd_ec_write(smbus, AMD_SMB_CMD, command); - if (status) - return status; - if (read_write == I2C_SMBUS_WRITE) { - status = amd_ec_write(smbus, AMD_SMB_DATA, - data->byte); - if (status) - return status; - } - protocol |= AMD_SMB_PRTCL_BYTE_DATA; - break; - - case I2C_SMBUS_WORD_DATA: - status = amd_ec_write(smbus, AMD_SMB_CMD, command); - if (status) - return status; - if (read_write == I2C_SMBUS_WRITE) { - status = amd_ec_write(smbus, AMD_SMB_DATA, - data->word & 0xff); - if (status) - return status; - status = amd_ec_write(smbus, AMD_SMB_DATA + 1, - data->word >> 8); - if (status) - return status; - } - protocol |= AMD_SMB_PRTCL_WORD_DATA | pec; - break; - - case I2C_SMBUS_BLOCK_DATA: - status = amd_ec_write(smbus, AMD_SMB_CMD, command); - if (status) - return status; - if (read_write == I2C_SMBUS_WRITE) { - len = min_t(u8, data->block[0], - I2C_SMBUS_BLOCK_MAX); - status = amd_ec_write(smbus, AMD_SMB_BCNT, len); - if (status) - return status; - for (i = 0; i < len; i++) { - status = - amd_ec_write(smbus, AMD_SMB_DATA + i, - data->block[i + 1]); - if (status) - return status; - } - } - protocol |= AMD_SMB_PRTCL_BLOCK_DATA | pec; - break; - - case I2C_SMBUS_I2C_BLOCK_DATA: - len = min_t(u8, data->block[0], - I2C_SMBUS_BLOCK_MAX); - status = amd_ec_write(smbus, AMD_SMB_CMD, command); - if (status) - return status; - status = amd_ec_write(smbus, AMD_SMB_BCNT, len); - if (status) - return status; - if (read_write == I2C_SMBUS_WRITE) - for (i = 0; i < len; i++) { - status = - amd_ec_write(smbus, AMD_SMB_DATA + i, - data->block[i + 1]); - if (status) - return status; - } - protocol |= AMD_SMB_PRTCL_I2C_BLOCK_DATA; - break; - - case I2C_SMBUS_PROC_CALL: - status = amd_ec_write(smbus, AMD_SMB_CMD, command); - if (status) - return status; - status = amd_ec_write(smbus, AMD_SMB_DATA, - data->word & 0xff); - if (status) - return status; - status = amd_ec_write(smbus, AMD_SMB_DATA + 1, - data->word >> 8); - if (status) - return status; - protocol = AMD_SMB_PRTCL_PROC_CALL | pec; - read_write = I2C_SMBUS_READ; - break; - - case I2C_SMBUS_BLOCK_PROC_CALL: - len = min_t(u8, data->block[0], - I2C_SMBUS_BLOCK_MAX - 1); - status = amd_ec_write(smbus, AMD_SMB_CMD, command); - if (status) - return status; - status = amd_ec_write(smbus, AMD_SMB_BCNT, len); - if (status) - return status; - for (i = 0; i < len; i++) { - status = amd_ec_write(smbus, AMD_SMB_DATA + i, - data->block[i + 1]); - if (status) - return status; - } - protocol = AMD_SMB_PRTCL_BLOCK_PROC_CALL | pec; - read_write = I2C_SMBUS_READ; - break; - - default: - dev_warn(&adap->dev, "Unsupported transaction %d\n", size); - return -EOPNOTSUPP; - } - - status = amd_ec_write(smbus, AMD_SMB_ADDR, addr << 1); - if (status) - return status; - status = amd_ec_write(smbus, AMD_SMB_PRTCL, protocol); - if (status) - return status; - - status = amd_ec_read(smbus, AMD_SMB_STS, temp + 0); - if (status) - return status; - - if (~temp[0] & AMD_SMB_STS_DONE) { - udelay(500); - status = amd_ec_read(smbus, AMD_SMB_STS, temp + 0); - if (status) - return status; - } - - if (~temp[0] & AMD_SMB_STS_DONE) { - msleep(1); - status = amd_ec_read(smbus, AMD_SMB_STS, temp + 0); - if (status) - return status; - } - - if ((~temp[0] & AMD_SMB_STS_DONE) || (temp[0] & AMD_SMB_STS_STATUS)) - return -EIO; - - if (read_write == I2C_SMBUS_WRITE) - return 0; - - switch (size) { - case I2C_SMBUS_BYTE: - case I2C_SMBUS_BYTE_DATA: - status = amd_ec_read(smbus, AMD_SMB_DATA, &data->byte); - if (status) - return status; - break; - - case I2C_SMBUS_WORD_DATA: - case I2C_SMBUS_PROC_CALL: - status = amd_ec_read(smbus, AMD_SMB_DATA, temp + 0); - if (status) - return status; - status = amd_ec_read(smbus, AMD_SMB_DATA + 1, temp + 1); - if (status) - return status; - data->word = (temp[1] << 8) | temp[0]; - break; - - case I2C_SMBUS_BLOCK_DATA: - case I2C_SMBUS_BLOCK_PROC_CALL: - status = amd_ec_read(smbus, AMD_SMB_BCNT, &len); - if (status) - return status; - len = min_t(u8, len, I2C_SMBUS_BLOCK_MAX); - case I2C_SMBUS_I2C_BLOCK_DATA: - for (i = 0; i < len; i++) { - status = amd_ec_read(smbus, AMD_SMB_DATA + i, - data->block + i + 1); - if (status) - return status; - } - data->block[0] = len; - break; - } - - return 0; -} - - -static u32 amd8111_func(struct i2c_adapter *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_PROC_CALL | I2C_FUNC_SMBUS_BLOCK_PROC_CALL | - I2C_FUNC_SMBUS_I2C_BLOCK | I2C_FUNC_SMBUS_PEC; -} - -static const struct i2c_algorithm smbus_algorithm = { - .smbus_xfer = amd8111_access, - .functionality = amd8111_func, -}; - - -static DEFINE_PCI_DEVICE_TABLE(amd8111_ids) = { - { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_SMBUS2) }, - { 0, } -}; - -MODULE_DEVICE_TABLE (pci, amd8111_ids); - -static int __devinit amd8111_probe(struct pci_dev *dev, - const struct pci_device_id *id) -{ - struct amd_smbus *smbus; - int error; - - if (!(pci_resource_flags(dev, 0) & IORESOURCE_IO)) - return -ENODEV; - - smbus = kzalloc(sizeof(struct amd_smbus), GFP_KERNEL); - if (!smbus) - return -ENOMEM; - - smbus->dev = dev; - smbus->base = pci_resource_start(dev, 0); - smbus->size = pci_resource_len(dev, 0); - - error = acpi_check_resource_conflict(&dev->resource[0]); - if (error) { - error = -ENODEV; - goto out_kfree; - } - - if (!request_region(smbus->base, smbus->size, amd8111_driver.name)) { - error = -EBUSY; - goto out_kfree; - } - - smbus->adapter.owner = THIS_MODULE; - snprintf(smbus->adapter.name, sizeof(smbus->adapter.name), - "SMBus2 AMD8111 adapter at %04x", smbus->base); - smbus->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD; - smbus->adapter.algo = &smbus_algorithm; - smbus->adapter.algo_data = smbus; - - /* set up the sysfs linkage to our parent device */ - smbus->adapter.dev.parent = &dev->dev; - - pci_write_config_dword(smbus->dev, AMD_PCI_MISC, 0); - error = i2c_add_adapter(&smbus->adapter); - if (error) - goto out_release_region; - - pci_set_drvdata(dev, smbus); - return 0; - - out_release_region: - release_region(smbus->base, smbus->size); - out_kfree: - kfree(smbus); - return error; -} - -static void __devexit amd8111_remove(struct pci_dev *dev) -{ - struct amd_smbus *smbus = pci_get_drvdata(dev); - - i2c_del_adapter(&smbus->adapter); - release_region(smbus->base, smbus->size); - kfree(smbus); -} - -static struct pci_driver amd8111_driver = { - .name = "amd8111_smbus2", - .id_table = amd8111_ids, - .probe = amd8111_probe, - .remove = __devexit_p(amd8111_remove), -}; - -static int __init i2c_amd8111_init(void) -{ - return pci_register_driver(&amd8111_driver); -} - -static void __exit i2c_amd8111_exit(void) -{ - pci_unregister_driver(&amd8111_driver); -} - -module_init(i2c_amd8111_init); -module_exit(i2c_amd8111_exit); |