diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-sis5595.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/busses/i2c-sis5595.c | 434 |
1 files changed, 0 insertions, 434 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-sis5595.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-sis5595.c deleted file mode 100644 index 87e5126d..00000000 --- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-sis5595.c +++ /dev/null @@ -1,434 +0,0 @@ -/* - Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and - Philip Edelbrock <phil@netroedge.com> - - 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; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -/* Note: we assume there can only be one SIS5595 with one SMBus interface */ - -/* - Note: all have mfr. ID 0x1039. - SUPPORTED PCI ID - 5595 0008 - - Note: these chips contain a 0008 device which is incompatible with the - 5595. We recognize these by the presence of the listed - "blacklist" PCI ID and refuse to load. - - NOT SUPPORTED PCI ID BLACKLIST PCI ID - 540 0008 0540 - 550 0008 0550 - 5513 0008 5511 - 5581 0008 5597 - 5582 0008 5597 - 5597 0008 5597 - 5598 0008 5597/5598 - 630 0008 0630 - 645 0008 0645 - 646 0008 0646 - 648 0008 0648 - 650 0008 0650 - 651 0008 0651 - 730 0008 0730 - 735 0008 0735 - 745 0008 0745 - 746 0008 0746 -*/ - -/* TO DO: - * Add Block Transfers (ugly, but supported by the adapter) - * Add adapter resets - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/pci.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/i2c.h> -#include <linux/acpi.h> -#include <linux/io.h> - -static int blacklist[] = { - PCI_DEVICE_ID_SI_540, - PCI_DEVICE_ID_SI_550, - PCI_DEVICE_ID_SI_630, - PCI_DEVICE_ID_SI_645, - PCI_DEVICE_ID_SI_646, - PCI_DEVICE_ID_SI_648, - PCI_DEVICE_ID_SI_650, - PCI_DEVICE_ID_SI_651, - PCI_DEVICE_ID_SI_730, - PCI_DEVICE_ID_SI_735, - PCI_DEVICE_ID_SI_745, - PCI_DEVICE_ID_SI_746, - PCI_DEVICE_ID_SI_5511, /* 5513 chip has the 0008 device but that ID - shows up in other chips so we use the 5511 - ID for recognition */ - PCI_DEVICE_ID_SI_5597, - PCI_DEVICE_ID_SI_5598, - 0, /* terminates the list */ -}; - -/* Length of ISA address segment */ -#define SIS5595_EXTENT 8 -/* SIS5595 SMBus registers */ -#define SMB_STS_LO 0x00 -#define SMB_STS_HI 0x01 -#define SMB_CTL_LO 0x02 -#define SMB_CTL_HI 0x03 -#define SMB_ADDR 0x04 -#define SMB_CMD 0x05 -#define SMB_PCNT 0x06 -#define SMB_CNT 0x07 -#define SMB_BYTE 0x08 -#define SMB_DEV 0x10 -#define SMB_DB0 0x11 -#define SMB_DB1 0x12 -#define SMB_HAA 0x13 - -/* PCI Address Constants */ -#define SMB_INDEX 0x38 -#define SMB_DAT 0x39 -#define SIS5595_ENABLE_REG 0x40 -#define ACPI_BASE 0x90 - -/* Other settings */ -#define MAX_TIMEOUT 500 - -/* SIS5595 constants */ -#define SIS5595_QUICK 0x00 -#define SIS5595_BYTE 0x02 -#define SIS5595_BYTE_DATA 0x04 -#define SIS5595_WORD_DATA 0x06 -#define SIS5595_PROC_CALL 0x08 -#define SIS5595_BLOCK_DATA 0x0A - -/* insmod parameters */ - -/* If force_addr is set to anything different from 0, we forcibly enable - the device at the given address. */ -static u16 force_addr; -module_param(force_addr, ushort, 0); -MODULE_PARM_DESC(force_addr, "Initialize the base address of the i2c controller"); - -static struct pci_driver sis5595_driver; -static unsigned short sis5595_base; -static struct pci_dev *sis5595_pdev; - -static u8 sis5595_read(u8 reg) -{ - outb(reg, sis5595_base + SMB_INDEX); - return inb(sis5595_base + SMB_DAT); -} - -static void sis5595_write(u8 reg, u8 data) -{ - outb(reg, sis5595_base + SMB_INDEX); - outb(data, sis5595_base + SMB_DAT); -} - -static int __devinit sis5595_setup(struct pci_dev *SIS5595_dev) -{ - u16 a; - u8 val; - int *i; - int retval; - - /* Look for imposters */ - for (i = blacklist; *i != 0; i++) { - struct pci_dev *dev; - dev = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL); - if (dev) { - dev_err(&SIS5595_dev->dev, "Looked for SIS5595 but found unsupported device %.4x\n", *i); - pci_dev_put(dev); - return -ENODEV; - } - } - - /* Determine the address of the SMBus areas */ - pci_read_config_word(SIS5595_dev, ACPI_BASE, &sis5595_base); - if (sis5595_base == 0 && force_addr == 0) { - dev_err(&SIS5595_dev->dev, "ACPI base address uninitialized - upgrade BIOS or use force_addr=0xaddr\n"); - return -ENODEV; - } - - if (force_addr) - sis5595_base = force_addr & ~(SIS5595_EXTENT - 1); - dev_dbg(&SIS5595_dev->dev, "ACPI Base address: %04x\n", sis5595_base); - - /* NB: We grab just the two SMBus registers here, but this may still - * interfere with ACPI :-( */ - retval = acpi_check_region(sis5595_base + SMB_INDEX, 2, - sis5595_driver.name); - if (retval) - return retval; - - if (!request_region(sis5595_base + SMB_INDEX, 2, - sis5595_driver.name)) { - dev_err(&SIS5595_dev->dev, "SMBus registers 0x%04x-0x%04x already in use!\n", - sis5595_base + SMB_INDEX, sis5595_base + SMB_INDEX + 1); - return -ENODEV; - } - - if (force_addr) { - dev_info(&SIS5595_dev->dev, "forcing ISA address 0x%04X\n", sis5595_base); - if (pci_write_config_word(SIS5595_dev, ACPI_BASE, sis5595_base) - != PCIBIOS_SUCCESSFUL) - goto error; - if (pci_read_config_word(SIS5595_dev, ACPI_BASE, &a) - != PCIBIOS_SUCCESSFUL) - goto error; - if ((a & ~(SIS5595_EXTENT - 1)) != sis5595_base) { - /* doesn't work for some chips! */ - dev_err(&SIS5595_dev->dev, "force address failed - not supported?\n"); - goto error; - } - } - - if (pci_read_config_byte(SIS5595_dev, SIS5595_ENABLE_REG, &val) - != PCIBIOS_SUCCESSFUL) - goto error; - if ((val & 0x80) == 0) { - dev_info(&SIS5595_dev->dev, "enabling ACPI\n"); - if (pci_write_config_byte(SIS5595_dev, SIS5595_ENABLE_REG, val | 0x80) - != PCIBIOS_SUCCESSFUL) - goto error; - if (pci_read_config_byte(SIS5595_dev, SIS5595_ENABLE_REG, &val) - != PCIBIOS_SUCCESSFUL) - goto error; - if ((val & 0x80) == 0) { - /* doesn't work for some chips? */ - dev_err(&SIS5595_dev->dev, "ACPI enable failed - not supported?\n"); - goto error; - } - } - - /* Everything is happy */ - return 0; - -error: - release_region(sis5595_base + SMB_INDEX, 2); - return -ENODEV; -} - -static int sis5595_transaction(struct i2c_adapter *adap) -{ - int temp; - int result = 0; - int timeout = 0; - - /* Make sure the SMBus host is ready to start transmitting */ - temp = sis5595_read(SMB_STS_LO) + (sis5595_read(SMB_STS_HI) << 8); - if (temp != 0x00) { - dev_dbg(&adap->dev, "SMBus busy (%04x). Resetting...\n", temp); - sis5595_write(SMB_STS_LO, temp & 0xff); - sis5595_write(SMB_STS_HI, temp >> 8); - if ((temp = sis5595_read(SMB_STS_LO) + (sis5595_read(SMB_STS_HI) << 8)) != 0x00) { - dev_dbg(&adap->dev, "Failed! (%02x)\n", temp); - return -EBUSY; - } else { - dev_dbg(&adap->dev, "Successful!\n"); - } - } - - /* start the transaction by setting bit 4 */ - sis5595_write(SMB_CTL_LO, sis5595_read(SMB_CTL_LO) | 0x10); - - /* We will always wait for a fraction of a second! */ - do { - msleep(1); - temp = sis5595_read(SMB_STS_LO); - } while (!(temp & 0x40) && (timeout++ < MAX_TIMEOUT)); - - /* If the SMBus is still busy, we give up */ - if (timeout > MAX_TIMEOUT) { - dev_dbg(&adap->dev, "SMBus Timeout!\n"); - result = -ETIMEDOUT; - } - - if (temp & 0x10) { - dev_dbg(&adap->dev, "Error: Failed bus transaction\n"); - result = -ENXIO; - } - - if (temp & 0x20) { - dev_err(&adap->dev, "Bus collision! SMBus may be locked until " - "next hard reset (or not...)\n"); - /* Clock stops and slave is stuck in mid-transmission */ - result = -EIO; - } - - temp = sis5595_read(SMB_STS_LO) + (sis5595_read(SMB_STS_HI) << 8); - if (temp != 0x00) { - sis5595_write(SMB_STS_LO, temp & 0xff); - sis5595_write(SMB_STS_HI, temp >> 8); - } - - temp = sis5595_read(SMB_STS_LO) + (sis5595_read(SMB_STS_HI) << 8); - if (temp != 0x00) - dev_dbg(&adap->dev, "Failed reset at end of transaction (%02x)\n", temp); - - return result; -} - -/* Return negative errno on error. */ -static s32 sis5595_access(struct i2c_adapter *adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, union i2c_smbus_data *data) -{ - int status; - - switch (size) { - case I2C_SMBUS_QUICK: - sis5595_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01)); - size = SIS5595_QUICK; - break; - case I2C_SMBUS_BYTE: - sis5595_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01)); - if (read_write == I2C_SMBUS_WRITE) - sis5595_write(SMB_CMD, command); - size = SIS5595_BYTE; - break; - case I2C_SMBUS_BYTE_DATA: - sis5595_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01)); - sis5595_write(SMB_CMD, command); - if (read_write == I2C_SMBUS_WRITE) - sis5595_write(SMB_BYTE, data->byte); - size = SIS5595_BYTE_DATA; - break; - case I2C_SMBUS_PROC_CALL: - case I2C_SMBUS_WORD_DATA: - sis5595_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01)); - sis5595_write(SMB_CMD, command); - if (read_write == I2C_SMBUS_WRITE) { - sis5595_write(SMB_BYTE, data->word & 0xff); - sis5595_write(SMB_BYTE + 1, - (data->word & 0xff00) >> 8); - } - size = (size == I2C_SMBUS_PROC_CALL) ? SIS5595_PROC_CALL : SIS5595_WORD_DATA; - break; - default: - dev_warn(&adap->dev, "Unsupported transaction %d\n", size); - return -EOPNOTSUPP; - } - - sis5595_write(SMB_CTL_LO, ((size & 0x0E))); - - status = sis5595_transaction(adap); - if (status) - return status; - - if ((size != SIS5595_PROC_CALL) && - ((read_write == I2C_SMBUS_WRITE) || (size == SIS5595_QUICK))) - return 0; - - - switch (size) { - case SIS5595_BYTE: - case SIS5595_BYTE_DATA: - data->byte = sis5595_read(SMB_BYTE); - break; - case SIS5595_WORD_DATA: - case SIS5595_PROC_CALL: - data->word = sis5595_read(SMB_BYTE) + (sis5595_read(SMB_BYTE + 1) << 8); - break; - } - return 0; -} - -static u32 sis5595_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_PROC_CALL; -} - -static const struct i2c_algorithm smbus_algorithm = { - .smbus_xfer = sis5595_access, - .functionality = sis5595_func, -}; - -static struct i2c_adapter sis5595_adapter = { - .owner = THIS_MODULE, - .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, - .algo = &smbus_algorithm, -}; - -static DEFINE_PCI_DEVICE_TABLE(sis5595_ids) = { - { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) }, - { 0, } -}; - -MODULE_DEVICE_TABLE (pci, sis5595_ids); - -static int __devinit sis5595_probe(struct pci_dev *dev, const struct pci_device_id *id) -{ - int err; - - if (sis5595_setup(dev)) { - dev_err(&dev->dev, "SIS5595 not detected, module not inserted.\n"); - return -ENODEV; - } - - /* set up the sysfs linkage to our parent device */ - sis5595_adapter.dev.parent = &dev->dev; - - snprintf(sis5595_adapter.name, sizeof(sis5595_adapter.name), - "SMBus SIS5595 adapter at %04x", sis5595_base + SMB_INDEX); - err = i2c_add_adapter(&sis5595_adapter); - if (err) { - release_region(sis5595_base + SMB_INDEX, 2); - return err; - } - - /* Always return failure here. This is to allow other drivers to bind - * to this pci device. We don't really want to have control over the - * pci device, we only wanted to read as few register values from it. - */ - sis5595_pdev = pci_dev_get(dev); - return -ENODEV; -} - -static struct pci_driver sis5595_driver = { - .name = "sis5595_smbus", - .id_table = sis5595_ids, - .probe = sis5595_probe, -}; - -static int __init i2c_sis5595_init(void) -{ - return pci_register_driver(&sis5595_driver); -} - -static void __exit i2c_sis5595_exit(void) -{ - pci_unregister_driver(&sis5595_driver); - if (sis5595_pdev) { - i2c_del_adapter(&sis5595_adapter); - release_region(sis5595_base + SMB_INDEX, 2); - pci_dev_put(sis5595_pdev); - sis5595_pdev = NULL; - } -} - -MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>"); -MODULE_DESCRIPTION("SIS5595 SMBus driver"); -MODULE_LICENSE("GPL"); - -module_init(i2c_sis5595_init); -module_exit(i2c_sis5595_exit); |