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Diffstat (limited to 'drivers/media/video/saa7134/saa7134-i2c.c')
-rw-r--r--drivers/media/video/saa7134/saa7134-i2c.c435
1 files changed, 0 insertions, 435 deletions
diff --git a/drivers/media/video/saa7134/saa7134-i2c.c b/drivers/media/video/saa7134/saa7134-i2c.c
deleted file mode 100644
index a176ec3285e0..000000000000
--- a/drivers/media/video/saa7134/saa7134-i2c.c
+++ /dev/null
@@ -1,435 +0,0 @@
-/*
- *
- * device driver for philips saa7134 based TV cards
- * i2c interface support
- *
- * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
- *
- * 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.
- */
-
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-
-#include "saa7134-reg.h"
-#include "saa7134.h"
-#include <media/v4l2-common.h>
-
-/* ----------------------------------------------------------- */
-
-static unsigned int i2c_debug;
-module_param(i2c_debug, int, 0644);
-MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
-
-static unsigned int i2c_scan;
-module_param(i2c_scan, int, 0444);
-MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
-
-#define d1printk if (1 == i2c_debug) printk
-#define d2printk if (2 == i2c_debug) printk
-
-#define I2C_WAIT_DELAY 32
-#define I2C_WAIT_RETRY 16
-
-/* ----------------------------------------------------------- */
-
-static char *str_i2c_status[] = {
- "IDLE", "DONE_STOP", "BUSY", "TO_SCL", "TO_ARB", "DONE_WRITE",
- "DONE_READ", "DONE_WRITE_TO", "DONE_READ_TO", "NO_DEVICE",
- "NO_ACKN", "BUS_ERR", "ARB_LOST", "SEQ_ERR", "ST_ERR", "SW_ERR"
-};
-
-enum i2c_status {
- IDLE = 0, // no I2C command pending
- DONE_STOP = 1, // I2C command done and STOP executed
- BUSY = 2, // executing I2C command
- TO_SCL = 3, // executing I2C command, time out on clock stretching
- TO_ARB = 4, // time out on arbitration trial, still trying
- DONE_WRITE = 5, // I2C command done and awaiting next write command
- DONE_READ = 6, // I2C command done and awaiting next read command
- DONE_WRITE_TO = 7, // see 5, and time out on status echo
- DONE_READ_TO = 8, // see 6, and time out on status echo
- NO_DEVICE = 9, // no acknowledge on device slave address
- NO_ACKN = 10, // no acknowledge after data byte transfer
- BUS_ERR = 11, // bus error
- ARB_LOST = 12, // arbitration lost during transfer
- SEQ_ERR = 13, // erroneous programming sequence
- ST_ERR = 14, // wrong status echoing
- SW_ERR = 15 // software error
-};
-
-static char *str_i2c_attr[] = {
- "NOP", "STOP", "CONTINUE", "START"
-};
-
-enum i2c_attr {
- NOP = 0, // no operation on I2C bus
- STOP = 1, // stop condition, no associated byte transfer
- CONTINUE = 2, // continue with byte transfer
- START = 3 // start condition with byte transfer
-};
-
-static inline enum i2c_status i2c_get_status(struct saa7134_dev *dev)
-{
- enum i2c_status status;
-
- status = saa_readb(SAA7134_I2C_ATTR_STATUS) & 0x0f;
- d2printk(KERN_DEBUG "%s: i2c stat <= %s\n",dev->name,
- str_i2c_status[status]);
- return status;
-}
-
-static inline void i2c_set_status(struct saa7134_dev *dev,
- enum i2c_status status)
-{
- d2printk(KERN_DEBUG "%s: i2c stat => %s\n",dev->name,
- str_i2c_status[status]);
- saa_andorb(SAA7134_I2C_ATTR_STATUS,0x0f,status);
-}
-
-static inline void i2c_set_attr(struct saa7134_dev *dev, enum i2c_attr attr)
-{
- d2printk(KERN_DEBUG "%s: i2c attr => %s\n",dev->name,
- str_i2c_attr[attr]);
- saa_andorb(SAA7134_I2C_ATTR_STATUS,0xc0,attr << 6);
-}
-
-static inline int i2c_is_error(enum i2c_status status)
-{
- switch (status) {
- case NO_DEVICE:
- case NO_ACKN:
- case BUS_ERR:
- case ARB_LOST:
- case SEQ_ERR:
- case ST_ERR:
- return true;
- default:
- return false;
- }
-}
-
-static inline int i2c_is_idle(enum i2c_status status)
-{
- switch (status) {
- case IDLE:
- case DONE_STOP:
- return true;
- default:
- return false;
- }
-}
-
-static inline int i2c_is_busy(enum i2c_status status)
-{
- switch (status) {
- case BUSY:
- case TO_SCL:
- case TO_ARB:
- return true;
- default:
- return false;
- }
-}
-
-static int i2c_is_busy_wait(struct saa7134_dev *dev)
-{
- enum i2c_status status;
- int count;
-
- for (count = 0; count < I2C_WAIT_RETRY; count++) {
- status = i2c_get_status(dev);
- if (!i2c_is_busy(status))
- break;
- saa_wait(I2C_WAIT_DELAY);
- }
- if (I2C_WAIT_RETRY == count)
- return false;
- return true;
-}
-
-static int i2c_reset(struct saa7134_dev *dev)
-{
- enum i2c_status status;
- int count;
-
- d2printk(KERN_DEBUG "%s: i2c reset\n",dev->name);
- status = i2c_get_status(dev);
- if (!i2c_is_error(status))
- return true;
- i2c_set_status(dev,status);
-
- for (count = 0; count < I2C_WAIT_RETRY; count++) {
- status = i2c_get_status(dev);
- if (!i2c_is_error(status))
- break;
- udelay(I2C_WAIT_DELAY);
- }
- if (I2C_WAIT_RETRY == count)
- return false;
-
- if (!i2c_is_idle(status))
- return false;
-
- i2c_set_attr(dev,NOP);
- return true;
-}
-
-static inline int i2c_send_byte(struct saa7134_dev *dev,
- enum i2c_attr attr,
- unsigned char data)
-{
- enum i2c_status status;
- __u32 dword;
-
- /* have to write both attr + data in one 32bit word */
- dword = saa_readl(SAA7134_I2C_ATTR_STATUS >> 2);
- dword &= 0x0f;
- dword |= (attr << 6);
- dword |= ((__u32)data << 8);
- dword |= 0x00 << 16; /* 100 kHz */
-// dword |= 0x40 << 16; /* 400 kHz */
- dword |= 0xf0 << 24;
- saa_writel(SAA7134_I2C_ATTR_STATUS >> 2, dword);
- d2printk(KERN_DEBUG "%s: i2c data => 0x%x\n",dev->name,data);
-
- if (!i2c_is_busy_wait(dev))
- return -EIO;
- status = i2c_get_status(dev);
- if (i2c_is_error(status))
- return -EIO;
- return 0;
-}
-
-static inline int i2c_recv_byte(struct saa7134_dev *dev)
-{
- enum i2c_status status;
- unsigned char data;
-
- i2c_set_attr(dev,CONTINUE);
- if (!i2c_is_busy_wait(dev))
- return -EIO;
- status = i2c_get_status(dev);
- if (i2c_is_error(status))
- return -EIO;
- data = saa_readb(SAA7134_I2C_DATA);
- d2printk(KERN_DEBUG "%s: i2c data <= 0x%x\n",dev->name,data);
- return data;
-}
-
-static int saa7134_i2c_xfer(struct i2c_adapter *i2c_adap,
- struct i2c_msg *msgs, int num)
-{
- struct saa7134_dev *dev = i2c_adap->algo_data;
- enum i2c_status status;
- unsigned char data;
- int addr,rc,i,byte;
-
- status = i2c_get_status(dev);
- if (!i2c_is_idle(status))
- if (!i2c_reset(dev))
- return -EIO;
-
- d2printk("start xfer\n");
- d1printk(KERN_DEBUG "%s: i2c xfer:",dev->name);
- for (i = 0; i < num; i++) {
- if (!(msgs[i].flags & I2C_M_NOSTART) || 0 == i) {
- /* send address */
- d2printk("send address\n");
- addr = msgs[i].addr << 1;
- if (msgs[i].flags & I2C_M_RD)
- addr |= 1;
- if (i > 0 && msgs[i].flags &
- I2C_M_RD && msgs[i].addr != 0x40 &&
- msgs[i].addr != 0x19) {
- /* workaround for a saa7134 i2c bug
- * needed to talk to the mt352 demux
- * thanks to pinnacle for the hint */
- int quirk = 0xfe;
- d1printk(" [%02x quirk]",quirk);
- i2c_send_byte(dev,START,quirk);
- i2c_recv_byte(dev);
- }
- d1printk(" < %02x", addr);
- rc = i2c_send_byte(dev,START,addr);
- if (rc < 0)
- goto err;
- }
- if (msgs[i].flags & I2C_M_RD) {
- /* read bytes */
- d2printk("read bytes\n");
- for (byte = 0; byte < msgs[i].len; byte++) {
- d1printk(" =");
- rc = i2c_recv_byte(dev);
- if (rc < 0)
- goto err;
- d1printk("%02x", rc);
- msgs[i].buf[byte] = rc;
- }
- /* discard mysterious extra byte when reading
- from Samsung S5H1411. i2c bus gets error
- if we do not. */
- if (0x19 == msgs[i].addr) {
- d1printk(" ?");
- rc = i2c_recv_byte(dev);
- if (rc < 0)
- goto err;
- d1printk("%02x", rc);
- }
- } else {
- /* write bytes */
- d2printk("write bytes\n");
- for (byte = 0; byte < msgs[i].len; byte++) {
- data = msgs[i].buf[byte];
- d1printk(" %02x", data);
- rc = i2c_send_byte(dev,CONTINUE,data);
- if (rc < 0)
- goto err;
- }
- }
- }
- d2printk("xfer done\n");
- d1printk(" >");
- i2c_set_attr(dev,STOP);
- rc = -EIO;
- if (!i2c_is_busy_wait(dev))
- goto err;
- status = i2c_get_status(dev);
- if (i2c_is_error(status))
- goto err;
- /* ensure that the bus is idle for at least one bit slot */
- msleep(1);
-
- d1printk("\n");
- return num;
- err:
- if (1 == i2c_debug) {
- status = i2c_get_status(dev);
- printk(" ERROR: %s\n",str_i2c_status[status]);
- }
- return rc;
-}
-
-/* ----------------------------------------------------------- */
-
-static u32 functionality(struct i2c_adapter *adap)
-{
- return I2C_FUNC_SMBUS_EMUL;
-}
-
-static struct i2c_algorithm saa7134_algo = {
- .master_xfer = saa7134_i2c_xfer,
- .functionality = functionality,
-};
-
-static struct i2c_adapter saa7134_adap_template = {
- .owner = THIS_MODULE,
- .name = "saa7134",
- .algo = &saa7134_algo,
-};
-
-static struct i2c_client saa7134_client_template = {
- .name = "saa7134 internal",
-};
-
-/* ----------------------------------------------------------- */
-
-static int
-saa7134_i2c_eeprom(struct saa7134_dev *dev, unsigned char *eedata, int len)
-{
- unsigned char buf;
- int i,err;
-
- dev->i2c_client.addr = 0xa0 >> 1;
- buf = 0;
- if (1 != (err = i2c_master_send(&dev->i2c_client,&buf,1))) {
- printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
- dev->name,err);
- return -1;
- }
- if (len != (err = i2c_master_recv(&dev->i2c_client,eedata,len))) {
- printk(KERN_WARNING "%s: i2c eeprom read error (err=%d)\n",
- dev->name,err);
- return -1;
- }
- for (i = 0; i < len; i++) {
- if (0 == (i % 16))
- printk(KERN_INFO "%s: i2c eeprom %02x:",dev->name,i);
- printk(" %02x",eedata[i]);
- if (15 == (i % 16))
- printk("\n");
- }
- return 0;
-}
-
-static char *i2c_devs[128] = {
- [ 0x20 ] = "mpeg encoder (saa6752hs)",
- [ 0xa0 >> 1 ] = "eeprom",
- [ 0xc0 >> 1 ] = "tuner (analog)",
- [ 0x86 >> 1 ] = "tda9887",
- [ 0x5a >> 1 ] = "remote control",
-};
-
-static void do_i2c_scan(char *name, struct i2c_client *c)
-{
- unsigned char buf;
- int i,rc;
-
- for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
- c->addr = i;
- rc = i2c_master_recv(c,&buf,0);
- if (rc < 0)
- continue;
- printk("%s: i2c scan: found device @ 0x%x [%s]\n",
- name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
- }
-}
-
-int saa7134_i2c_register(struct saa7134_dev *dev)
-{
- dev->i2c_adap = saa7134_adap_template;
- dev->i2c_adap.dev.parent = &dev->pci->dev;
- strcpy(dev->i2c_adap.name,dev->name);
- dev->i2c_adap.algo_data = dev;
- i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
- i2c_add_adapter(&dev->i2c_adap);
-
- dev->i2c_client = saa7134_client_template;
- dev->i2c_client.adapter = &dev->i2c_adap;
-
- saa7134_i2c_eeprom(dev,dev->eedata,sizeof(dev->eedata));
- if (i2c_scan)
- do_i2c_scan(dev->name,&dev->i2c_client);
-
- /* Instantiate the IR receiver device, if present */
- saa7134_probe_i2c_ir(dev);
- return 0;
-}
-
-int saa7134_i2c_unregister(struct saa7134_dev *dev)
-{
- i2c_del_adapter(&dev->i2c_adap);
- return 0;
-}
-
-/* ----------------------------------------------------------- */
-/*
- * Local variables:
- * c-basic-offset: 8
- * End:
- */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.