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[media] rtl2830: convert to regmap API
Use regmap to cover register access routines. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Antti Palosaari
Mauro Carvalho Chehab
parent
fd4cfa8bb1
commit
15d37f3824
@ -444,6 +444,7 @@ config DVB_CXD2820R
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config DVB_RTL2830
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tristate "Realtek RTL2830 DVB-T"
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depends on DVB_CORE && I2C && I2C_MUX
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select REGMAP
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default m if !MEDIA_SUBDRV_AUTOSELECT
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help
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Say Y when you want to support this frontend.
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@ -17,174 +17,41 @@
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#include "rtl2830_priv.h"
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/* Max transfer size done by I2C transfer functions */
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#define MAX_XFER_SIZE 64
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/* write multiple hardware registers */
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static int rtl2830_wr(struct i2c_client *client, u8 reg, const u8 *val, int len)
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{
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int ret;
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u8 buf[MAX_XFER_SIZE];
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struct i2c_msg msg[1] = {
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{
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.addr = client->addr,
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.flags = 0,
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.len = 1 + len,
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.buf = buf,
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}
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};
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if (1 + len > sizeof(buf)) {
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dev_warn(&client->dev, "i2c wr reg=%04x: len=%d is too big!\n",
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reg, len);
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return -EINVAL;
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}
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buf[0] = reg;
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memcpy(&buf[1], val, len);
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ret = __i2c_transfer(client->adapter, msg, 1);
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if (ret == 1) {
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ret = 0;
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} else {
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dev_warn(&client->dev, "i2c wr failed=%d reg=%02x len=%d\n",
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ret, reg, len);
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ret = -EREMOTEIO;
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}
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return ret;
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}
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/* read multiple hardware registers */
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static int rtl2830_rd(struct i2c_client *client, u8 reg, u8 *val, int len)
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{
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int ret;
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struct i2c_msg msg[2] = {
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{
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.addr = client->addr,
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.flags = 0,
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.len = 1,
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.buf = ®,
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}, {
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.addr = client->addr,
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.flags = I2C_M_RD,
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.len = len,
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.buf = val,
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}
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};
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ret = __i2c_transfer(client->adapter, msg, 2);
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if (ret == 2) {
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ret = 0;
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} else {
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dev_warn(&client->dev, "i2c rd failed=%d reg=%02x len=%d\n",
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ret, reg, len);
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ret = -EREMOTEIO;
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}
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return ret;
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}
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/* write multiple registers */
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static int rtl2830_wr_regs(struct i2c_client *client, u16 reg, const u8 *val, int len)
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/* Our regmap is bypassing I2C adapter lock, thus we do it! */
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int rtl2830_bulk_write(struct i2c_client *client, unsigned int reg,
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const void *val, size_t val_count)
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{
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struct rtl2830_dev *dev = i2c_get_clientdata(client);
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int ret;
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u8 reg2 = (reg >> 0) & 0xff;
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u8 page = (reg >> 8) & 0xff;
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mutex_lock(&dev->i2c_mutex);
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/* switch bank if needed */
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if (page != dev->page) {
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ret = rtl2830_wr(client, 0x00, &page, 1);
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if (ret)
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goto err_mutex_unlock;
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dev->page = page;
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}
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ret = rtl2830_wr(client, reg2, val, len);
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err_mutex_unlock:
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mutex_unlock(&dev->i2c_mutex);
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i2c_lock_adapter(client->adapter);
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ret = regmap_bulk_write(dev->regmap, reg, val, val_count);
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i2c_unlock_adapter(client->adapter);
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return ret;
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}
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/* read multiple registers */
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static int rtl2830_rd_regs(struct i2c_client *client, u16 reg, u8 *val, int len)
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int rtl2830_update_bits(struct i2c_client *client, unsigned int reg,
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unsigned int mask, unsigned int val)
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{
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struct rtl2830_dev *dev = i2c_get_clientdata(client);
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int ret;
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u8 reg2 = (reg >> 0) & 0xff;
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u8 page = (reg >> 8) & 0xff;
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mutex_lock(&dev->i2c_mutex);
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/* switch bank if needed */
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if (page != dev->page) {
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ret = rtl2830_wr(client, 0x00, &page, 1);
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if (ret)
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goto err_mutex_unlock;
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dev->page = page;
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}
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ret = rtl2830_rd(client, reg2, val, len);
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err_mutex_unlock:
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mutex_unlock(&dev->i2c_mutex);
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i2c_lock_adapter(client->adapter);
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ret = regmap_update_bits(dev->regmap, reg, mask, val);
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i2c_unlock_adapter(client->adapter);
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return ret;
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}
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/* read single register */
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static int rtl2830_rd_reg(struct i2c_client *client, u16 reg, u8 *val)
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{
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return rtl2830_rd_regs(client, reg, val, 1);
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}
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/* write single register with mask */
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static int rtl2830_wr_reg_mask(struct i2c_client *client, u16 reg, u8 val, u8 mask)
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int rtl2830_bulk_read(struct i2c_client *client, unsigned int reg, void *val,
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size_t val_count)
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{
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struct rtl2830_dev *dev = i2c_get_clientdata(client);
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int ret;
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u8 tmp;
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/* no need for read if whole reg is written */
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if (mask != 0xff) {
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ret = rtl2830_rd_regs(client, reg, &tmp, 1);
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if (ret)
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return ret;
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val &= mask;
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tmp &= ~mask;
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val |= tmp;
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}
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return rtl2830_wr_regs(client, reg, &val, 1);
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}
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/* read single register with mask */
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static int rtl2830_rd_reg_mask(struct i2c_client *client, u16 reg, u8 *val, u8 mask)
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{
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int ret, i;
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u8 tmp;
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ret = rtl2830_rd_regs(client, reg, &tmp, 1);
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if (ret)
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return ret;
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tmp &= mask;
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/* find position of the first bit */
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for (i = 0; i < 8; i++) {
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if ((mask >> i) & 0x01)
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break;
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}
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*val = tmp >> i;
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return 0;
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i2c_lock_adapter(client->adapter);
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ret = regmap_bulk_read(dev->regmap, reg, val, val_count);
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i2c_unlock_adapter(client->adapter);
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return ret;
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}
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static int rtl2830_init(struct dvb_frontend *fe)
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@ -233,29 +100,29 @@ static int rtl2830_init(struct dvb_frontend *fe)
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};
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for (i = 0; i < ARRAY_SIZE(tab); i++) {
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ret = rtl2830_wr_reg_mask(client, tab[i].reg, tab[i].val,
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tab[i].mask);
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ret = rtl2830_update_bits(client, tab[i].reg, tab[i].mask,
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tab[i].val);
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if (ret)
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goto err;
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}
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ret = rtl2830_wr_regs(client, 0x18f, "\x28\x00", 2);
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ret = rtl2830_bulk_write(client, 0x18f, "\x28\x00", 2);
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if (ret)
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goto err;
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ret = rtl2830_wr_regs(client, 0x195,
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"\x04\x06\x0a\x12\x0a\x12\x1e\x28", 8);
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ret = rtl2830_bulk_write(client, 0x195,
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"\x04\x06\x0a\x12\x0a\x12\x1e\x28", 8);
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if (ret)
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goto err;
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/* TODO: spec init */
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/* soft reset */
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ret = rtl2830_wr_reg_mask(client, 0x101, 0x04, 0x04);
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ret = rtl2830_update_bits(client, 0x101, 0x04, 0x04);
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if (ret)
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goto err;
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ret = rtl2830_wr_reg_mask(client, 0x101, 0x00, 0x04);
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ret = rtl2830_update_bits(client, 0x101, 0x04, 0x00);
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if (ret)
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goto err;
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@ -309,7 +176,7 @@ static int rtl2830_set_frontend(struct dvb_frontend *fe)
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret, i;
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u64 num;
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u8 buf[3], tmp;
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u8 buf[3], u8tmp;
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u32 if_ctl, if_frequency;
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static const u8 bw_params1[3][34] = {
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{
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@ -358,7 +225,7 @@ static int rtl2830_set_frontend(struct dvb_frontend *fe)
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return -EINVAL;
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}
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ret = rtl2830_wr_reg_mask(client, 0x008, i << 1, 0x06);
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ret = rtl2830_update_bits(client, 0x008, 0x06, i << 1);
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if (ret)
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goto err;
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@ -378,30 +245,31 @@ static int rtl2830_set_frontend(struct dvb_frontend *fe)
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dev_dbg(&client->dev, "if_frequency=%d if_ctl=%08x\n",
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if_frequency, if_ctl);
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ret = rtl2830_rd_reg_mask(client, 0x119, &tmp, 0xc0); /* b[7:6] */
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if (ret)
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goto err;
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buf[0] = tmp << 6;
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buf[0] |= (if_ctl >> 16) & 0x3f;
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buf[0] = (if_ctl >> 16) & 0x3f;
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buf[1] = (if_ctl >> 8) & 0xff;
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buf[2] = (if_ctl >> 0) & 0xff;
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ret = rtl2830_wr_regs(client, 0x119, buf, 3);
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ret = rtl2830_bulk_read(client, 0x119, &u8tmp, 1);
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if (ret)
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goto err;
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buf[0] |= u8tmp & 0xc0; /* [7:6] */
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ret = rtl2830_bulk_write(client, 0x119, buf, 3);
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if (ret)
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goto err;
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/* 1/2 split I2C write */
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ret = rtl2830_wr_regs(client, 0x11c, &bw_params1[i][0], 17);
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ret = rtl2830_bulk_write(client, 0x11c, &bw_params1[i][0], 17);
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if (ret)
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goto err;
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/* 2/2 split I2C write */
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ret = rtl2830_wr_regs(client, 0x12d, &bw_params1[i][17], 17);
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ret = rtl2830_bulk_write(client, 0x12d, &bw_params1[i][17], 17);
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if (ret)
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goto err;
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ret = rtl2830_wr_regs(client, 0x19d, bw_params2[i], 6);
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ret = rtl2830_bulk_write(client, 0x19d, bw_params2[i], 6);
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if (ret)
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goto err;
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@ -422,11 +290,11 @@ static int rtl2830_get_frontend(struct dvb_frontend *fe)
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if (dev->sleeping)
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return 0;
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ret = rtl2830_rd_regs(client, 0x33c, buf, 2);
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ret = rtl2830_bulk_read(client, 0x33c, buf, 2);
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if (ret)
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goto err;
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ret = rtl2830_rd_reg(client, 0x351, &buf[2]);
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ret = rtl2830_bulk_read(client, 0x351, &buf[2], 1);
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if (ret)
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goto err;
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@ -529,21 +397,22 @@ static int rtl2830_read_status(struct dvb_frontend *fe, fe_status_t *status)
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struct i2c_client *client = fe->demodulator_priv;
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struct rtl2830_dev *dev = i2c_get_clientdata(client);
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int ret;
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u8 tmp;
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u8 u8tmp;
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*status = 0;
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if (dev->sleeping)
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return 0;
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ret = rtl2830_rd_reg_mask(client, 0x351, &tmp, 0x78); /* [6:3] */
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ret = rtl2830_bulk_read(client, 0x351, &u8tmp, 1);
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if (ret)
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goto err;
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if (tmp == 11) {
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u8tmp = (u8tmp >> 3) & 0x0f; /* [6:3] */
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if (u8tmp == 11) {
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*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
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FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
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} else if (tmp == 10) {
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} else if (u8tmp == 10) {
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*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
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FE_HAS_VITERBI;
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}
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@ -650,7 +519,7 @@ static void rtl2830_stat_work(struct work_struct *work)
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struct {signed int x:14; } s;
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/* read IF AGC */
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ret = rtl2830_rd_regs(client, 0x359, buf, 2);
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ret = rtl2830_bulk_read(client, 0x359, buf, 2);
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if (ret)
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goto err;
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@ -678,7 +547,7 @@ static void rtl2830_stat_work(struct work_struct *work)
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{92888734, 92888734, 95487525, 99770748},
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};
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ret = rtl2830_rd_reg(client, 0x33c, &u8tmp);
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ret = rtl2830_bulk_read(client, 0x33c, &u8tmp, 1);
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if (ret)
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goto err;
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@ -690,7 +559,7 @@ static void rtl2830_stat_work(struct work_struct *work)
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if (hierarchy > HIERARCHY_NUM - 1)
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goto err_schedule_delayed_work;
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ret = rtl2830_rd_regs(client, 0x40c, buf, 2);
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ret = rtl2830_bulk_read(client, 0x40c, buf, 2);
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if (ret)
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goto err;
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@ -711,7 +580,7 @@ static void rtl2830_stat_work(struct work_struct *work)
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/* BER */
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if (dev->fe_status & FE_HAS_LOCK) {
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ret = rtl2830_rd_regs(client, 0x34e, buf, 2);
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ret = rtl2830_bulk_read(client, 0x34e, buf, 2);
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if (ret)
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goto err;
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@ -751,7 +620,7 @@ static int rtl2830_pid_filter_ctrl(struct dvb_frontend *fe, int onoff)
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else
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u8tmp = 0x00;
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ret = rtl2830_wr_reg_mask(client, 0x061, u8tmp, 0x80);
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ret = rtl2830_update_bits(client, 0x061, 0x80, u8tmp);
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if (ret)
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goto err;
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@ -785,14 +654,14 @@ static int rtl2830_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid, int on
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buf[1] = (dev->filters >> 8) & 0xff;
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buf[2] = (dev->filters >> 16) & 0xff;
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buf[3] = (dev->filters >> 24) & 0xff;
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ret = rtl2830_wr_regs(client, 0x062, buf, 4);
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ret = rtl2830_bulk_write(client, 0x062, buf, 4);
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if (ret)
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goto err;
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/* add PID */
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buf[0] = (pid >> 8) & 0xff;
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buf[1] = (pid >> 0) & 0xff;
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ret = rtl2830_wr_regs(client, 0x066 + 2 * index, buf, 2);
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ret = rtl2830_bulk_write(client, 0x066 + 2 * index, buf, 2);
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if (ret)
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goto err;
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@ -803,55 +672,24 @@ err:
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}
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/*
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* I2C gate/repeater logic
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* We must use unlocked i2c_transfer() here because I2C lock is already taken
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* by tuner driver. Gate is closed automatically after single I2C xfer.
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* I2C gate/mux/repeater logic
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* We must use unlocked __i2c_transfer() here (through regmap) because of I2C
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* adapter lock is already taken by tuner driver.
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* Gate is closed automatically after single I2C transfer.
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*/
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static int rtl2830_select(struct i2c_adapter *adap, void *mux_priv, u32 chan_id)
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{
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struct i2c_client *client = mux_priv;
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struct rtl2830_dev *dev = i2c_get_clientdata(client);
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struct i2c_msg select_reg_page_msg[1] = {
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{
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.addr = client->addr,
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.flags = 0,
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.len = 2,
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.buf = "\x00\x01",
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}
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};
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struct i2c_msg gate_open_msg[1] = {
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{
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.addr = client->addr,
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.flags = 0,
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.len = 2,
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.buf = "\x01\x08",
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}
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};
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int ret;
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dev_dbg(&client->dev, "\n");
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mutex_lock(&dev->i2c_mutex);
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/* select register page */
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ret = __i2c_transfer(client->adapter, select_reg_page_msg, 1);
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if (ret != 1) {
|
||||
dev_warn(&client->dev, "i2c write failed %d\n", ret);
|
||||
if (ret >= 0)
|
||||
ret = -EREMOTEIO;
|
||||
/* open I2C repeater for 1 transfer, closes automatically */
|
||||
/* XXX: regmap_update_bits() does not lock I2C adapter */
|
||||
ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x08);
|
||||
if (ret)
|
||||
goto err;
|
||||
}
|
||||
|
||||
dev->page = 1;
|
||||
|
||||
/* open tuner I2C repeater for 1 xfer, closes automatically */
|
||||
ret = __i2c_transfer(client->adapter, gate_open_msg, 1);
|
||||
if (ret != 1) {
|
||||
dev_warn(&client->dev, "i2c write failed %d\n", ret);
|
||||
if (ret >= 0)
|
||||
ret = -EREMOTEIO;
|
||||
goto err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
err:
|
||||
@ -859,18 +697,6 @@ err:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rtl2830_deselect(struct i2c_adapter *adap, void *mux_priv, u32 chan)
|
||||
{
|
||||
struct i2c_client *client = mux_priv;
|
||||
struct rtl2830_dev *dev = i2c_get_clientdata(client);
|
||||
|
||||
dev_dbg(&client->dev, "\n");
|
||||
|
||||
mutex_unlock(&dev->i2c_mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct dvb_frontend *rtl2830_get_dvb_frontend(struct i2c_client *client)
|
||||
{
|
||||
struct rtl2830_dev *dev = i2c_get_clientdata(client);
|
||||
@ -889,6 +715,91 @@ static struct i2c_adapter *rtl2830_get_i2c_adapter(struct i2c_client *client)
|
||||
return dev->adapter;
|
||||
}
|
||||
|
||||
/*
|
||||
* We implement own I2C access routines for regmap in order to get manual access
|
||||
* to I2C adapter lock, which is needed for I2C mux adapter.
|
||||
*/
|
||||
static int rtl2830_regmap_read(void *context, const void *reg_buf,
|
||||
size_t reg_size, void *val_buf, size_t val_size)
|
||||
{
|
||||
struct i2c_client *client = context;
|
||||
int ret;
|
||||
struct i2c_msg msg[2] = {
|
||||
{
|
||||
.addr = client->addr,
|
||||
.flags = 0,
|
||||
.len = reg_size,
|
||||
.buf = (u8 *)reg_buf,
|
||||
}, {
|
||||
.addr = client->addr,
|
||||
.flags = I2C_M_RD,
|
||||
.len = val_size,
|
||||
.buf = val_buf,
|
||||
}
|
||||
};
|
||||
|
||||
ret = __i2c_transfer(client->adapter, msg, 2);
|
||||
if (ret != 2) {
|
||||
dev_warn(&client->dev, "i2c reg read failed %d\n", ret);
|
||||
if (ret >= 0)
|
||||
ret = -EREMOTEIO;
|
||||
return ret;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rtl2830_regmap_write(void *context, const void *data, size_t count)
|
||||
{
|
||||
struct i2c_client *client = context;
|
||||
int ret;
|
||||
struct i2c_msg msg[1] = {
|
||||
{
|
||||
.addr = client->addr,
|
||||
.flags = 0,
|
||||
.len = count,
|
||||
.buf = (u8 *)data,
|
||||
}
|
||||
};
|
||||
|
||||
ret = __i2c_transfer(client->adapter, msg, 1);
|
||||
if (ret != 1) {
|
||||
dev_warn(&client->dev, "i2c reg write failed %d\n", ret);
|
||||
if (ret >= 0)
|
||||
ret = -EREMOTEIO;
|
||||
return ret;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rtl2830_regmap_gather_write(void *context, const void *reg,
|
||||
size_t reg_len, const void *val,
|
||||
size_t val_len)
|
||||
{
|
||||
struct i2c_client *client = context;
|
||||
int ret;
|
||||
u8 buf[256];
|
||||
struct i2c_msg msg[1] = {
|
||||
{
|
||||
.addr = client->addr,
|
||||
.flags = 0,
|
||||
.len = 1 + val_len,
|
||||
.buf = buf,
|
||||
}
|
||||
};
|
||||
|
||||
buf[0] = *(u8 const *)reg;
|
||||
memcpy(&buf[1], val, val_len);
|
||||
|
||||
ret = __i2c_transfer(client->adapter, msg, 1);
|
||||
if (ret != 1) {
|
||||
dev_warn(&client->dev, "i2c reg write failed %d\n", ret);
|
||||
if (ret >= 0)
|
||||
ret = -EREMOTEIO;
|
||||
return ret;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rtl2830_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
@ -896,6 +807,30 @@ static int rtl2830_probe(struct i2c_client *client,
|
||||
struct rtl2830_dev *dev;
|
||||
int ret;
|
||||
u8 u8tmp;
|
||||
static const struct regmap_bus regmap_bus = {
|
||||
.read = rtl2830_regmap_read,
|
||||
.write = rtl2830_regmap_write,
|
||||
.gather_write = rtl2830_regmap_gather_write,
|
||||
.val_format_endian_default = REGMAP_ENDIAN_NATIVE,
|
||||
};
|
||||
static const struct regmap_range_cfg regmap_range_cfg[] = {
|
||||
{
|
||||
.selector_reg = 0x00,
|
||||
.selector_mask = 0xff,
|
||||
.selector_shift = 0,
|
||||
.window_start = 0,
|
||||
.window_len = 0x100,
|
||||
.range_min = 0 * 0x100,
|
||||
.range_max = 5 * 0x100,
|
||||
},
|
||||
};
|
||||
static const struct regmap_config regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
.max_register = 5 * 0x100,
|
||||
.ranges = regmap_range_cfg,
|
||||
.num_ranges = ARRAY_SIZE(regmap_range_cfg),
|
||||
};
|
||||
|
||||
dev_dbg(&client->dev, "\n");
|
||||
|
||||
@ -916,20 +851,25 @@ static int rtl2830_probe(struct i2c_client *client,
|
||||
dev->client = client;
|
||||
dev->pdata = client->dev.platform_data;
|
||||
dev->sleeping = true;
|
||||
mutex_init(&dev->i2c_mutex);
|
||||
INIT_DELAYED_WORK(&dev->stat_work, rtl2830_stat_work);
|
||||
dev->regmap = regmap_init(&client->dev, ®map_bus, client,
|
||||
®map_config);
|
||||
if (IS_ERR(dev->regmap)) {
|
||||
ret = PTR_ERR(dev->regmap);
|
||||
goto err_kfree;
|
||||
}
|
||||
|
||||
/* check if the demod is there */
|
||||
ret = rtl2830_rd_reg(client, 0x000, &u8tmp);
|
||||
ret = rtl2830_bulk_read(client, 0x000, &u8tmp, 1);
|
||||
if (ret)
|
||||
goto err_kfree;
|
||||
goto err_regmap_exit;
|
||||
|
||||
/* create muxed i2c adapter for tuner */
|
||||
dev->adapter = i2c_add_mux_adapter(client->adapter, &client->dev,
|
||||
client, 0, 0, 0, rtl2830_select, rtl2830_deselect);
|
||||
client, 0, 0, 0, rtl2830_select, NULL);
|
||||
if (dev->adapter == NULL) {
|
||||
ret = -ENODEV;
|
||||
goto err_kfree;
|
||||
goto err_regmap_exit;
|
||||
}
|
||||
|
||||
/* create dvb frontend */
|
||||
@ -945,6 +885,8 @@ static int rtl2830_probe(struct i2c_client *client,
|
||||
dev_info(&client->dev, "Realtek RTL2830 successfully attached\n");
|
||||
|
||||
return 0;
|
||||
err_regmap_exit:
|
||||
regmap_exit(dev->regmap);
|
||||
err_kfree:
|
||||
kfree(dev);
|
||||
err:
|
||||
@ -959,6 +901,7 @@ static int rtl2830_remove(struct i2c_client *client)
|
||||
dev_dbg(&client->dev, "\n");
|
||||
|
||||
i2c_del_mux_adapter(dev->adapter);
|
||||
regmap_exit(dev->regmap);
|
||||
kfree(dev);
|
||||
|
||||
return 0;
|
||||
|
||||
@ -23,15 +23,15 @@
|
||||
#include "rtl2830.h"
|
||||
#include <linux/i2c-mux.h>
|
||||
#include <linux/math64.h>
|
||||
#include <linux/regmap.h>
|
||||
|
||||
struct rtl2830_dev {
|
||||
struct rtl2830_platform_data *pdata;
|
||||
struct i2c_client *client;
|
||||
struct regmap *regmap;
|
||||
struct i2c_adapter *adapter;
|
||||
struct dvb_frontend fe;
|
||||
bool sleeping;
|
||||
struct mutex i2c_mutex;
|
||||
u8 page; /* active register page */
|
||||
unsigned long filters;
|
||||
struct delayed_work stat_work;
|
||||
fe_status_t fe_status;
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user