From ad04d5c3879dcf79ba0fa1826eab991f7b7a2de8 Mon Sep 17 00:00:00 2001 From: Hans-Frieder Vogt Date: Sun, 10 Dec 2006 21:21:29 +0100 Subject: i2c: Cleanups to the i2c-nforce2 bus driver Summary of changes: - fixes: o legacy I/O region size is 64 bytes, not 8 bytes - general cleanup: o removed code for the unsupported I2C block data, block data, proc call and block proc call transfer modes o removed detail warnings about unsupported modes that are covered in a general warning (unsupported transaction...) anyway o removed necessity of a definition of struct i2c_adapter o moved definition of struct i2c_algorithm, making forward declarations of nforce2_access and nforce2_func unnecessary - minor changes: o in the description mention the nForce 5xx chipsets o changes my e-mail address in MODULE_AUTHOR Theses cleanups shrink the driver binary size from 4.0 kB to 2.7 kB on i386. Signed-off-by: Hans-Frieder Vogt Signed-off-by: Jean Delvare --- Documentation/i2c/busses/i2c-nforce2 | 2 +- drivers/i2c/busses/i2c-nforce2.c | 89 ++++++------------------------------ 2 files changed, 15 insertions(+), 76 deletions(-) diff --git a/Documentation/i2c/busses/i2c-nforce2 b/Documentation/i2c/busses/i2c-nforce2 index 5465ed0..7f61fbc 100644 --- a/Documentation/i2c/busses/i2c-nforce2 +++ b/Documentation/i2c/busses/i2c-nforce2 @@ -14,7 +14,7 @@ Datasheet: not publicly available, but seems to be similar to the AMD-8111 SMBus 2.0 adapter. Authors: - Hans-Frieder Vogt , + Hans-Frieder Vogt , Thomas Leibold , Patrick Dreker diff --git a/drivers/i2c/busses/i2c-nforce2.c b/drivers/i2c/busses/i2c-nforce2.c index e0292e4..ad37c10 100644 --- a/drivers/i2c/busses/i2c-nforce2.c +++ b/drivers/i2c/busses/i2c-nforce2.c @@ -35,7 +35,7 @@ nForce4 MCP55 0368 This driver supports the 2 SMBuses that are included in the MCP of the - nForce2/3/4 chipsets. + nForce2/3/4/5xx chipsets. */ /* Note: we assume there can only be one nForce2, with two SMBus interfaces */ @@ -52,8 +52,8 @@ #include MODULE_LICENSE("GPL"); -MODULE_AUTHOR ("Hans-Frieder Vogt "); -MODULE_DESCRIPTION("nForce2 SMBus driver"); +MODULE_AUTHOR ("Hans-Frieder Vogt "); +MODULE_DESCRIPTION("nForce2/3/4/5xx SMBus driver"); struct nforce2_smbus { @@ -80,9 +80,6 @@ struct nforce2_smbus { #define NVIDIA_SMB_ADDR (smbus->base + 0x02) /* address */ #define NVIDIA_SMB_CMD (smbus->base + 0x03) /* command */ #define NVIDIA_SMB_DATA (smbus->base + 0x04) /* 32 data registers */ -#define NVIDIA_SMB_BCNT (smbus->base + 0x24) /* number of data bytes */ -#define NVIDIA_SMB_ALRM_A (smbus->base + 0x25) /* alarm address */ -#define NVIDIA_SMB_ALRM_D (smbus->base + 0x26) /* 2 bytes alarm data */ #define NVIDIA_SMB_STS_DONE 0x80 #define NVIDIA_SMB_STS_ALRM 0x40 @@ -95,40 +92,17 @@ struct nforce2_smbus { #define NVIDIA_SMB_PRTCL_BYTE 0x04 #define NVIDIA_SMB_PRTCL_BYTE_DATA 0x06 #define NVIDIA_SMB_PRTCL_WORD_DATA 0x08 -#define NVIDIA_SMB_PRTCL_BLOCK_DATA 0x0a -#define NVIDIA_SMB_PRTCL_PROC_CALL 0x0c -#define NVIDIA_SMB_PRTCL_BLOCK_PROC_CALL 0x0d -#define NVIDIA_SMB_PRTCL_I2C_BLOCK_DATA 0x4a #define NVIDIA_SMB_PRTCL_PEC 0x80 static struct pci_driver nforce2_driver; -static s32 nforce2_access(struct i2c_adapter *adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, union i2c_smbus_data *data); -static u32 nforce2_func(struct i2c_adapter *adapter); - - -static const struct i2c_algorithm smbus_algorithm = { - .smbus_xfer = nforce2_access, - .functionality = nforce2_func, -}; - -static struct i2c_adapter nforce2_adapter = { - .owner = THIS_MODULE, - .class = I2C_CLASS_HWMON, - .algo = &smbus_algorithm, -}; - -/* Return -1 on error. See smbus.h for more information */ +/* Return -1 on error */ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr, unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data * data) { struct nforce2_smbus *smbus = adap->algo_data; unsigned char protocol, pec, temp; - unsigned char len = 0; /* to keep the compiler quiet */ - int i; protocol = (read_write == I2C_SMBUS_READ) ? NVIDIA_SMB_PRTCL_READ : NVIDIA_SMB_PRTCL_WRITE; @@ -163,35 +137,6 @@ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr, protocol |= NVIDIA_SMB_PRTCL_WORD_DATA | pec; break; - case I2C_SMBUS_BLOCK_DATA: - outb_p(command, NVIDIA_SMB_CMD); - if (read_write == I2C_SMBUS_WRITE) { - len = min_t(u8, data->block[0], 32); - outb_p(len, NVIDIA_SMB_BCNT); - for (i = 0; i < len; i++) - outb_p(data->block[i + 1], NVIDIA_SMB_DATA+i); - } - protocol |= NVIDIA_SMB_PRTCL_BLOCK_DATA | pec; - break; - - case I2C_SMBUS_I2C_BLOCK_DATA: - len = min_t(u8, data->block[0], 32); - outb_p(command, NVIDIA_SMB_CMD); - outb_p(len, NVIDIA_SMB_BCNT); - if (read_write == I2C_SMBUS_WRITE) - for (i = 0; i < len; i++) - outb_p(data->block[i + 1], NVIDIA_SMB_DATA+i); - protocol |= NVIDIA_SMB_PRTCL_I2C_BLOCK_DATA; - break; - - case I2C_SMBUS_PROC_CALL: - dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n"); - return -1; - - case I2C_SMBUS_BLOCK_PROC_CALL: - dev_err(&adap->dev, "I2C_SMBUS_BLOCK_PROC_CALL not supported!\n"); - return -1; - default: dev_err(&adap->dev, "Unsupported transaction %d\n", size); return -1; @@ -227,19 +172,8 @@ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr, break; case I2C_SMBUS_WORD_DATA: - /* case I2C_SMBUS_PROC_CALL: not supported */ data->word = inb_p(NVIDIA_SMB_DATA) | (inb_p(NVIDIA_SMB_DATA+1) << 8); break; - - case I2C_SMBUS_BLOCK_DATA: - /* case I2C_SMBUS_BLOCK_PROC_CALL: not supported */ - len = inb_p(NVIDIA_SMB_BCNT); - len = min_t(u8, len, 32); - case I2C_SMBUS_I2C_BLOCK_DATA: - for (i = 0; i < len; i++) - data->block[i+1] = inb_p(NVIDIA_SMB_DATA + i); - data->block[0] = len; - break; } return 0; @@ -250,10 +184,14 @@ static u32 nforce2_func(struct i2c_adapter *adapter) { /* other functionality might be possible, but is not tested */ 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_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA; } +static struct i2c_algorithm smbus_algorithm = { + .smbus_xfer = nforce2_access, + .functionality = nforce2_func, +}; + static struct pci_device_id nforce2_ids[] = { { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS) }, @@ -267,7 +205,6 @@ static struct pci_device_id nforce2_ids[] = { { 0 } }; - MODULE_DEVICE_TABLE (pci, nforce2_ids); @@ -291,7 +228,7 @@ static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar, } smbus->base = iobase & PCI_BASE_ADDRESS_IO_MASK; - smbus->size = 8; + smbus->size = 64; } smbus->dev = dev; @@ -300,7 +237,9 @@ static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar, smbus->base, smbus->base+smbus->size-1, name); return -1; } - smbus->adapter = nforce2_adapter; + smbus->adapter.owner = THIS_MODULE; + smbus->adapter.class = I2C_CLASS_HWMON; + smbus->adapter.algo = &smbus_algorithm; smbus->adapter.algo_data = smbus; smbus->adapter.dev.parent = &dev->dev; snprintf(smbus->adapter.name, I2C_NAME_SIZE, -- cgit v1.1