diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-scmi.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/busses/i2c-scmi.c | 445 |
1 files changed, 0 insertions, 445 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-scmi.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-scmi.c deleted file mode 100644 index 388cbdc9..00000000 --- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-scmi.c +++ /dev/null @@ -1,445 +0,0 @@ -/* - * SMBus driver for ACPI SMBus CMI - * - * Copyright (C) 2009 Crane Cai <crane.cai@amd.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 version 2. - */ - -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/kernel.h> -#include <linux/stddef.h> -#include <linux/init.h> -#include <linux/i2c.h> -#include <linux/acpi.h> - -#define ACPI_SMBUS_HC_CLASS "smbus" -#define ACPI_SMBUS_HC_DEVICE_NAME "cmi" - -ACPI_MODULE_NAME("smbus_cmi"); - -struct smbus_methods_t { - char *mt_info; - char *mt_sbr; - char *mt_sbw; -}; - -struct acpi_smbus_cmi { - acpi_handle handle; - struct i2c_adapter adapter; - u8 cap_info:1; - u8 cap_read:1; - u8 cap_write:1; - struct smbus_methods_t *methods; -}; - -static const struct smbus_methods_t smbus_methods = { - .mt_info = "_SBI", - .mt_sbr = "_SBR", - .mt_sbw = "_SBW", -}; - -/* Some IBM BIOSes omit the leading underscore */ -static const struct smbus_methods_t ibm_smbus_methods = { - .mt_info = "SBI_", - .mt_sbr = "SBR_", - .mt_sbw = "SBW_", -}; - -static const struct acpi_device_id acpi_smbus_cmi_ids[] = { - {"SMBUS01", (kernel_ulong_t)&smbus_methods}, - {ACPI_SMBUS_IBM_HID, (kernel_ulong_t)&ibm_smbus_methods}, - {"", 0} -}; -MODULE_DEVICE_TABLE(acpi, acpi_smbus_cmi_ids); - -#define ACPI_SMBUS_STATUS_OK 0x00 -#define ACPI_SMBUS_STATUS_FAIL 0x07 -#define ACPI_SMBUS_STATUS_DNAK 0x10 -#define ACPI_SMBUS_STATUS_DERR 0x11 -#define ACPI_SMBUS_STATUS_CMD_DENY 0x12 -#define ACPI_SMBUS_STATUS_UNKNOWN 0x13 -#define ACPI_SMBUS_STATUS_ACC_DENY 0x17 -#define ACPI_SMBUS_STATUS_TIMEOUT 0x18 -#define ACPI_SMBUS_STATUS_NOTSUP 0x19 -#define ACPI_SMBUS_STATUS_BUSY 0x1a -#define ACPI_SMBUS_STATUS_PEC 0x1f - -#define ACPI_SMBUS_PRTCL_WRITE 0x00 -#define ACPI_SMBUS_PRTCL_READ 0x01 -#define ACPI_SMBUS_PRTCL_QUICK 0x02 -#define ACPI_SMBUS_PRTCL_BYTE 0x04 -#define ACPI_SMBUS_PRTCL_BYTE_DATA 0x06 -#define ACPI_SMBUS_PRTCL_WORD_DATA 0x08 -#define ACPI_SMBUS_PRTCL_BLOCK_DATA 0x0a - - -static int -acpi_smbus_cmi_access(struct i2c_adapter *adap, u16 addr, unsigned short flags, - char read_write, u8 command, int size, - union i2c_smbus_data *data) -{ - int result = 0; - struct acpi_smbus_cmi *smbus_cmi = adap->algo_data; - unsigned char protocol; - acpi_status status = 0; - struct acpi_object_list input; - union acpi_object mt_params[5]; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - union acpi_object *pkg; - char *method; - int len = 0; - - dev_dbg(&adap->dev, "access size: %d %s\n", size, - (read_write) ? "READ" : "WRITE"); - switch (size) { - case I2C_SMBUS_QUICK: - protocol = ACPI_SMBUS_PRTCL_QUICK; - command = 0; - if (read_write == I2C_SMBUS_WRITE) { - mt_params[3].type = ACPI_TYPE_INTEGER; - mt_params[3].integer.value = 0; - mt_params[4].type = ACPI_TYPE_INTEGER; - mt_params[4].integer.value = 0; - } - break; - - case I2C_SMBUS_BYTE: - protocol = ACPI_SMBUS_PRTCL_BYTE; - if (read_write == I2C_SMBUS_WRITE) { - mt_params[3].type = ACPI_TYPE_INTEGER; - mt_params[3].integer.value = 0; - mt_params[4].type = ACPI_TYPE_INTEGER; - mt_params[4].integer.value = 0; - } else { - command = 0; - } - break; - - case I2C_SMBUS_BYTE_DATA: - protocol = ACPI_SMBUS_PRTCL_BYTE_DATA; - if (read_write == I2C_SMBUS_WRITE) { - mt_params[3].type = ACPI_TYPE_INTEGER; - mt_params[3].integer.value = 1; - mt_params[4].type = ACPI_TYPE_INTEGER; - mt_params[4].integer.value = data->byte; - } - break; - - case I2C_SMBUS_WORD_DATA: - protocol = ACPI_SMBUS_PRTCL_WORD_DATA; - if (read_write == I2C_SMBUS_WRITE) { - mt_params[3].type = ACPI_TYPE_INTEGER; - mt_params[3].integer.value = 2; - mt_params[4].type = ACPI_TYPE_INTEGER; - mt_params[4].integer.value = data->word; - } - break; - - case I2C_SMBUS_BLOCK_DATA: - protocol = ACPI_SMBUS_PRTCL_BLOCK_DATA; - if (read_write == I2C_SMBUS_WRITE) { - len = data->block[0]; - if (len == 0 || len > I2C_SMBUS_BLOCK_MAX) - return -EINVAL; - mt_params[3].type = ACPI_TYPE_INTEGER; - mt_params[3].integer.value = len; - mt_params[4].type = ACPI_TYPE_BUFFER; - mt_params[4].buffer.pointer = data->block + 1; - } - break; - - default: - dev_warn(&adap->dev, "Unsupported transaction %d\n", size); - return -EOPNOTSUPP; - } - - if (read_write == I2C_SMBUS_READ) { - protocol |= ACPI_SMBUS_PRTCL_READ; - method = smbus_cmi->methods->mt_sbr; - input.count = 3; - } else { - protocol |= ACPI_SMBUS_PRTCL_WRITE; - method = smbus_cmi->methods->mt_sbw; - input.count = 5; - } - - input.pointer = mt_params; - mt_params[0].type = ACPI_TYPE_INTEGER; - mt_params[0].integer.value = protocol; - mt_params[1].type = ACPI_TYPE_INTEGER; - mt_params[1].integer.value = addr; - mt_params[2].type = ACPI_TYPE_INTEGER; - mt_params[2].integer.value = command; - - status = acpi_evaluate_object(smbus_cmi->handle, method, &input, - &buffer); - if (ACPI_FAILURE(status)) { - ACPI_ERROR((AE_INFO, "Evaluating %s: %i", method, status)); - return -EIO; - } - - pkg = buffer.pointer; - if (pkg && pkg->type == ACPI_TYPE_PACKAGE) - obj = pkg->package.elements; - else { - ACPI_ERROR((AE_INFO, "Invalid argument type")); - result = -EIO; - goto out; - } - if (obj == NULL || obj->type != ACPI_TYPE_INTEGER) { - ACPI_ERROR((AE_INFO, "Invalid argument type")); - result = -EIO; - goto out; - } - - result = obj->integer.value; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s return status: %i\n", - method, result)); - - switch (result) { - case ACPI_SMBUS_STATUS_OK: - result = 0; - break; - case ACPI_SMBUS_STATUS_BUSY: - result = -EBUSY; - goto out; - case ACPI_SMBUS_STATUS_TIMEOUT: - result = -ETIMEDOUT; - goto out; - case ACPI_SMBUS_STATUS_DNAK: - result = -ENXIO; - goto out; - default: - result = -EIO; - goto out; - } - - if (read_write == I2C_SMBUS_WRITE || size == I2C_SMBUS_QUICK) - goto out; - - obj = pkg->package.elements + 1; - if (obj == NULL || obj->type != ACPI_TYPE_INTEGER) { - ACPI_ERROR((AE_INFO, "Invalid argument type")); - result = -EIO; - goto out; - } - - len = obj->integer.value; - obj = pkg->package.elements + 2; - switch (size) { - case I2C_SMBUS_BYTE: - case I2C_SMBUS_BYTE_DATA: - case I2C_SMBUS_WORD_DATA: - if (obj == NULL || obj->type != ACPI_TYPE_INTEGER) { - ACPI_ERROR((AE_INFO, "Invalid argument type")); - result = -EIO; - goto out; - } - if (len == 2) - data->word = obj->integer.value; - else - data->byte = obj->integer.value; - break; - case I2C_SMBUS_BLOCK_DATA: - if (obj == NULL || obj->type != ACPI_TYPE_BUFFER) { - ACPI_ERROR((AE_INFO, "Invalid argument type")); - result = -EIO; - goto out; - } - if (len == 0 || len > I2C_SMBUS_BLOCK_MAX) - return -EPROTO; - data->block[0] = len; - memcpy(data->block + 1, obj->buffer.pointer, len); - break; - } - -out: - kfree(buffer.pointer); - dev_dbg(&adap->dev, "Transaction status: %i\n", result); - return result; -} - -static u32 acpi_smbus_cmi_func(struct i2c_adapter *adapter) -{ - struct acpi_smbus_cmi *smbus_cmi = adapter->algo_data; - u32 ret; - - ret = smbus_cmi->cap_read | smbus_cmi->cap_write ? - I2C_FUNC_SMBUS_QUICK : 0; - - ret |= smbus_cmi->cap_read ? - (I2C_FUNC_SMBUS_READ_BYTE | - I2C_FUNC_SMBUS_READ_BYTE_DATA | - I2C_FUNC_SMBUS_READ_WORD_DATA | - I2C_FUNC_SMBUS_READ_BLOCK_DATA) : 0; - - ret |= smbus_cmi->cap_write ? - (I2C_FUNC_SMBUS_WRITE_BYTE | - I2C_FUNC_SMBUS_WRITE_BYTE_DATA | - I2C_FUNC_SMBUS_WRITE_WORD_DATA | - I2C_FUNC_SMBUS_WRITE_BLOCK_DATA) : 0; - - return ret; -} - -static const struct i2c_algorithm acpi_smbus_cmi_algorithm = { - .smbus_xfer = acpi_smbus_cmi_access, - .functionality = acpi_smbus_cmi_func, -}; - - -static int acpi_smbus_cmi_add_cap(struct acpi_smbus_cmi *smbus_cmi, - const char *name) -{ - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - acpi_status status; - - if (!strcmp(name, smbus_cmi->methods->mt_info)) { - status = acpi_evaluate_object(smbus_cmi->handle, - smbus_cmi->methods->mt_info, - NULL, &buffer); - if (ACPI_FAILURE(status)) { - ACPI_ERROR((AE_INFO, "Evaluating %s: %i", - smbus_cmi->methods->mt_info, status)); - return -EIO; - } - - obj = buffer.pointer; - if (obj && obj->type == ACPI_TYPE_PACKAGE) - obj = obj->package.elements; - else { - ACPI_ERROR((AE_INFO, "Invalid argument type")); - kfree(buffer.pointer); - return -EIO; - } - - if (obj->type != ACPI_TYPE_INTEGER) { - ACPI_ERROR((AE_INFO, "Invalid argument type")); - kfree(buffer.pointer); - return -EIO; - } else - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "SMBus CMI Version %x" - "\n", (int)obj->integer.value)); - - kfree(buffer.pointer); - smbus_cmi->cap_info = 1; - } else if (!strcmp(name, smbus_cmi->methods->mt_sbr)) - smbus_cmi->cap_read = 1; - else if (!strcmp(name, smbus_cmi->methods->mt_sbw)) - smbus_cmi->cap_write = 1; - else - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unsupported CMI method: %s\n", - name)); - - return 0; -} - -static acpi_status acpi_smbus_cmi_query_methods(acpi_handle handle, u32 level, - void *context, void **return_value) -{ - char node_name[5]; - struct acpi_buffer buffer = { sizeof(node_name), node_name }; - struct acpi_smbus_cmi *smbus_cmi = context; - acpi_status status; - - status = acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); - - if (ACPI_SUCCESS(status)) - acpi_smbus_cmi_add_cap(smbus_cmi, node_name); - - return AE_OK; -} - -static int acpi_smbus_cmi_add(struct acpi_device *device) -{ - struct acpi_smbus_cmi *smbus_cmi; - const struct acpi_device_id *id; - - smbus_cmi = kzalloc(sizeof(struct acpi_smbus_cmi), GFP_KERNEL); - if (!smbus_cmi) - return -ENOMEM; - - smbus_cmi->handle = device->handle; - strcpy(acpi_device_name(device), ACPI_SMBUS_HC_DEVICE_NAME); - strcpy(acpi_device_class(device), ACPI_SMBUS_HC_CLASS); - device->driver_data = smbus_cmi; - smbus_cmi->cap_info = 0; - smbus_cmi->cap_read = 0; - smbus_cmi->cap_write = 0; - - for (id = acpi_smbus_cmi_ids; id->id[0]; id++) - if (!strcmp(id->id, acpi_device_hid(device))) - smbus_cmi->methods = - (struct smbus_methods_t *) id->driver_data; - - acpi_walk_namespace(ACPI_TYPE_METHOD, smbus_cmi->handle, 1, - acpi_smbus_cmi_query_methods, NULL, smbus_cmi, NULL); - - if (smbus_cmi->cap_info == 0) - goto err; - - snprintf(smbus_cmi->adapter.name, sizeof(smbus_cmi->adapter.name), - "SMBus CMI adapter %s", - acpi_device_name(device)); - smbus_cmi->adapter.owner = THIS_MODULE; - smbus_cmi->adapter.algo = &acpi_smbus_cmi_algorithm; - smbus_cmi->adapter.algo_data = smbus_cmi; - smbus_cmi->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD; - smbus_cmi->adapter.dev.parent = &device->dev; - - if (i2c_add_adapter(&smbus_cmi->adapter)) { - dev_err(&device->dev, "Couldn't register adapter!\n"); - goto err; - } - - return 0; - -err: - kfree(smbus_cmi); - device->driver_data = NULL; - return -EIO; -} - -static int acpi_smbus_cmi_remove(struct acpi_device *device, int type) -{ - struct acpi_smbus_cmi *smbus_cmi = acpi_driver_data(device); - - i2c_del_adapter(&smbus_cmi->adapter); - kfree(smbus_cmi); - device->driver_data = NULL; - - return 0; -} - -static struct acpi_driver acpi_smbus_cmi_driver = { - .name = ACPI_SMBUS_HC_DEVICE_NAME, - .class = ACPI_SMBUS_HC_CLASS, - .ids = acpi_smbus_cmi_ids, - .ops = { - .add = acpi_smbus_cmi_add, - .remove = acpi_smbus_cmi_remove, - }, -}; - -static int __init acpi_smbus_cmi_init(void) -{ - return acpi_bus_register_driver(&acpi_smbus_cmi_driver); -} - -static void __exit acpi_smbus_cmi_exit(void) -{ - acpi_bus_unregister_driver(&acpi_smbus_cmi_driver); -} - -module_init(acpi_smbus_cmi_init); -module_exit(acpi_smbus_cmi_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Crane Cai <crane.cai@amd.com>"); -MODULE_DESCRIPTION("ACPI SMBus CMI driver"); |