[media] dm1105: GPIO handling added, I2C on GPIO added, LNB control through GPIO reworked

Here is patch for GPIO's handling.
It allows to support I2C on GPIO's and per board LNB control through GPIO's.
Also incuded some support for Hendrik Skarpeid card.
For those, who needs to tweak the driver,
I think it is clear how to change and test GPIO's for LNB and other GPIO related stuff now.

[mchehab@redhat.com: I2C_CLASS_TV_DIGITAL is deprecated. removed to avoid breaking compilation]
Signed-off-by: Igor M. Liplianin <liplianin@me.by>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/dm1105/dm1105.c

@@ -20,6 +20,7 @@
  */
 
 #include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -54,6 +55,7 @@
 #define DM1105_BOARD_DVBWORLD_2002		1
 #define DM1105_BOARD_DVBWORLD_2004		2
 #define DM1105_BOARD_AXESS_DM05			3
+#define DM1105_BOARD_UNBRANDED_I2C_ON_GPIO	4
 
 /* ----------------------------------------------- */
 /*
@@ -157,22 +159,38 @@
 #define DM1105_MAX				0x04
 
 #define DRIVER_NAME				"dm1105"
+#define DM1105_I2C_GPIO_NAME			"dm1105-gpio"
 
 #define DM1105_DMA_PACKETS			47
 #define DM1105_DMA_PACKET_LENGTH		(128*4)
 #define DM1105_DMA_BYTES			(128 * 4 * DM1105_DMA_PACKETS)
 
+/*  */
+#define GPIO08					(1 << 8)
+#define GPIO13					(1 << 13)
+#define GPIO14					(1 << 14)
+#define GPIO15					(1 << 15)
+#define GPIO16					(1 << 16)
+#define GPIO17					(1 << 17)
+#define GPIO_ALL				0x03ffff
+
 /* GPIO's for LNB power control */
-#define DM1105_LNB_MASK				0x00000000
-#define DM1105_LNB_OFF				0x00020000
-#define DM1105_LNB_13V				0x00010100
-#define DM1105_LNB_18V				0x00000100
+#define DM1105_LNB_MASK				(GPIO_ALL & ~(GPIO14 | GPIO13))
+#define DM1105_LNB_OFF				GPIO17
+#define DM1105_LNB_13V				(GPIO16 | GPIO08)
+#define DM1105_LNB_18V				GPIO08
 
 /* GPIO's for LNB power control for Axess DM05 */
-#define DM05_LNB_MASK				0x00000000
-#define DM05_LNB_OFF				0x00020000/* actually 13v */
-#define DM05_LNB_13V				0x00020000
-#define DM05_LNB_18V				0x00030000
+#define DM05_LNB_MASK				(GPIO_ALL & ~(GPIO14 | GPIO13))
+#define DM05_LNB_OFF				GPIO17/* actually 13v */
+#define DM05_LNB_13V				GPIO17
+#define DM05_LNB_18V				(GPIO17 | GPIO16)
+
+/* GPIO's for LNB power control for unbranded with I2C on GPIO */
+#define UNBR_LNB_MASK				(GPIO17 | GPIO16)
+#define UNBR_LNB_OFF				0
+#define UNBR_LNB_13V				GPIO17
+#define UNBR_LNB_18V				(GPIO17 | GPIO16)
 
 static unsigned int card[]  = {[0 ... 3] = UNSET };
 module_param_array(card,  int, NULL, 0444);
@@ -188,6 +206,10 @@ DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 
 struct dm1105_board {
 	char	*name;
+	struct	{
+		u32	mask, off, v13, v18;
+	} lnb;
+	u32	gpio_scl, gpio_sda;
 };
 
 struct dm1105_subid {
@@ -199,15 +221,50 @@ struct dm1105_subid {
 static const struct dm1105_board dm1105_boards[] = {
 	[DM1105_BOARD_UNKNOWN] = {
 		.name		= "UNKNOWN/GENERIC",
+		.lnb = {
+			.mask = DM1105_LNB_MASK,
+			.off = DM1105_LNB_OFF,
+			.v13 = DM1105_LNB_13V,
+			.v18 = DM1105_LNB_18V,
+		},
 	},
 	[DM1105_BOARD_DVBWORLD_2002] = {
 		.name		= "DVBWorld PCI 2002",
+		.lnb = {
+			.mask = DM1105_LNB_MASK,
+			.off = DM1105_LNB_OFF,
+			.v13 = DM1105_LNB_13V,
+			.v18 = DM1105_LNB_18V,
+		},
 	},
 	[DM1105_BOARD_DVBWORLD_2004] = {
 		.name		= "DVBWorld PCI 2004",
+		.lnb = {
+			.mask = DM1105_LNB_MASK,
+			.off = DM1105_LNB_OFF,
+			.v13 = DM1105_LNB_13V,
+			.v18 = DM1105_LNB_18V,
+		},
 	},
 	[DM1105_BOARD_AXESS_DM05] = {
 		.name		= "Axess/EasyTv DM05",
+		.lnb = {
+			.mask = DM05_LNB_MASK,
+			.off = DM05_LNB_OFF,
+			.v13 = DM05_LNB_13V,
+			.v18 = DM05_LNB_18V,
+		},
+	},
+	[DM1105_BOARD_UNBRANDED_I2C_ON_GPIO] = {
+		.name		= "Unbranded DM1105 with i2c on GPIOs",
+		.lnb = {
+			.mask = UNBR_LNB_MASK,
+			.off = UNBR_LNB_OFF,
+			.v13 = UNBR_LNB_13V,
+			.v18 = UNBR_LNB_18V,
+		},
+		.gpio_scl	= GPIO14,
+		.gpio_sda	= GPIO13,
 	},
 };
 
@@ -293,6 +350,8 @@ struct dm1105_dev {
 
 	/* i2c */
 	struct i2c_adapter i2c_adap;
+	struct i2c_adapter i2c_bb_adap;
+	struct i2c_algo_bit_data i2c_bit;
 
 	/* irq */
 	struct work_struct work;
@@ -328,6 +387,103 @@ struct dm1105_dev {
 #define dm_setl(reg, bit)	dm_andorl((reg), (bit), (bit))
 #define dm_clearl(reg, bit)	dm_andorl((reg), (bit), 0)
 
+/* The chip has 18 GPIOs. In HOST mode GPIO's used as 15 bit address lines,
+ so we can use only 3 GPIO's from GPIO15 to GPIO17.
+ Here I don't check whether HOST is enebled as it is not implemented yet.
+ */
+static void dm1105_gpio_set(struct dm1105_dev *dev, u32 mask)
+{
+	if (mask & 0xfffc0000)
+		printk(KERN_ERR "%s: Only 18 GPIO's are allowed\n", __func__);
+
+	if (mask & 0x0003ffff)
+		dm_setl(DM1105_GPIOVAL, mask & 0x0003ffff);
+
+}
+
+static void dm1105_gpio_clear(struct dm1105_dev *dev, u32 mask)
+{
+	if (mask & 0xfffc0000)
+		printk(KERN_ERR "%s: Only 18 GPIO's are allowed\n", __func__);
+
+	if (mask & 0x0003ffff)
+		dm_clearl(DM1105_GPIOVAL, mask & 0x0003ffff);
+
+}
+
+static void dm1105_gpio_andor(struct dm1105_dev *dev, u32 mask, u32 val)
+{
+	if (mask & 0xfffc0000)
+		printk(KERN_ERR "%s: Only 18 GPIO's are allowed\n", __func__);
+
+	if (mask & 0x0003ffff)
+		dm_andorl(DM1105_GPIOVAL, mask & 0x0003ffff, val);
+
+}
+
+static u32 dm1105_gpio_get(struct dm1105_dev *dev, u32 mask)
+{
+	if (mask & 0xfffc0000)
+		printk(KERN_ERR "%s: Only 18 GPIO's are allowed\n", __func__);
+
+	if (mask & 0x0003ffff)
+		return dm_readl(DM1105_GPIOVAL) & mask & 0x0003ffff;
+
+	return 0;
+}
+
+static void dm1105_gpio_enable(struct dm1105_dev *dev, u32 mask, int asoutput)
+{
+	if (mask & 0xfffc0000)
+		printk(KERN_ERR "%s: Only 18 GPIO's are allowed\n", __func__);
+
+	if ((mask & 0x0003ffff) && asoutput)
+		dm_clearl(DM1105_GPIOCTR, mask & 0x0003ffff);
+	else if ((mask & 0x0003ffff) && !asoutput)
+		dm_setl(DM1105_GPIOCTR, mask & 0x0003ffff);
+
+}
+
+static void dm1105_setline(struct dm1105_dev *dev, u32 line, int state)
+{
+	if (state)
+		dm1105_gpio_enable(dev, line, 0);
+	else {
+		dm1105_gpio_enable(dev, line, 1);
+		dm1105_gpio_clear(dev, line);
+	}
+}
+
+static void dm1105_setsda(void *data, int state)
+{
+	struct dm1105_dev *dev = data;
+
+	dm1105_setline(dev, dm1105_boards[dev->boardnr].gpio_sda, state);
+}
+
+static void dm1105_setscl(void *data, int state)
+{
+	struct dm1105_dev *dev = data;
+
+	dm1105_setline(dev, dm1105_boards[dev->boardnr].gpio_scl, state);
+}
+
+static int dm1105_getsda(void *data)
+{
+	struct dm1105_dev *dev = data;
+
+	return dm1105_gpio_get(dev, dm1105_boards[dev->boardnr].gpio_sda)
+									? 1 : 0;
+}
+
+static int dm1105_getscl(void *data)
+{
+	struct dm1105_dev *dev = data;
+
+	return dm1105_gpio_get(dev, dm1105_boards[dev->boardnr].gpio_scl)
+									? 1 : 0;
+}
+
 static int dm1105_i2c_xfer(struct i2c_adapter *i2c_adap,
 			    struct i2c_msg *msgs, int num)
 {
@@ -436,31 +592,20 @@ static inline struct dm1105_dev *frontend_to_dm1105_dev(struct dvb_frontend *fe)
 static int dm1105_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
 {
 	struct dm1105_dev *dev = frontend_to_dm1105_dev(fe);
-	u32 lnb_mask, lnb_13v, lnb_18v, lnb_off;
 
-	switch (dev->boardnr) {
-	case DM1105_BOARD_AXESS_DM05:
-		lnb_mask = DM05_LNB_MASK;
-		lnb_off = DM05_LNB_OFF;
-		lnb_13v = DM05_LNB_13V;
-		lnb_18v = DM05_LNB_18V;
-		break;
-	case DM1105_BOARD_DVBWORLD_2002:
-	case DM1105_BOARD_DVBWORLD_2004:
-	default:
-		lnb_mask = DM1105_LNB_MASK;
-		lnb_off = DM1105_LNB_OFF;
-		lnb_13v = DM1105_LNB_13V;
-		lnb_18v = DM1105_LNB_18V;
-	}
-
-	dm_writel(DM1105_GPIOCTR, lnb_mask);
+	dm1105_gpio_enable(dev, dm1105_boards[dev->boardnr].lnb.mask, 1);
 	if (voltage == SEC_VOLTAGE_18)
-		dm_writel(DM1105_GPIOVAL, lnb_18v);
+		dm1105_gpio_andor(dev,
+				dm1105_boards[dev->boardnr].lnb.mask,
+				dm1105_boards[dev->boardnr].lnb.v18);
 	else if (voltage == SEC_VOLTAGE_13)
-		dm_writel(DM1105_GPIOVAL, lnb_13v);
+		dm1105_gpio_andor(dev,
+				dm1105_boards[dev->boardnr].lnb.mask,
+				dm1105_boards[dev->boardnr].lnb.v13);
 	else
-		dm_writel(DM1105_GPIOVAL, lnb_off);
+		dm1105_gpio_andor(dev,
+				dm1105_boards[dev->boardnr].lnb.mask,
+				dm1105_boards[dev->boardnr].lnb.off);
 
 	return 0;
 }
@@ -708,6 +853,38 @@ static int __devinit frontend_init(struct dm1105_dev *dev)
 	int ret;
 
 	switch (dev->boardnr) {
+	case DM1105_BOARD_UNBRANDED_I2C_ON_GPIO:
+		dm1105_gpio_enable(dev, GPIO15, 1);
+		dm1105_gpio_clear(dev, GPIO15);
+		msleep(100);
+		dm1105_gpio_set(dev, GPIO15);
+		msleep(200);
+		dev->fe = dvb_attach(
+			stv0299_attach, &sharp_z0194a_config,
+			&dev->i2c_bb_adap);
+		if (dev->fe) {
+			dev->fe->ops.set_voltage = dm1105_set_voltage;
+			dvb_attach(dvb_pll_attach, dev->fe, 0x60,
+					&dev->i2c_bb_adap, DVB_PLL_OPERA1);
+			break;
+		}
+
+		dev->fe = dvb_attach(
+			stv0288_attach, &earda_config,
+			&dev->i2c_bb_adap);
+		if (dev->fe) {
+			dev->fe->ops.set_voltage = dm1105_set_voltage;
+			dvb_attach(stb6000_attach, dev->fe, 0x61,
+					&dev->i2c_bb_adap);
+			break;
+		}
+
+		dev->fe = dvb_attach(
+			si21xx_attach, &serit_config,
+			&dev->i2c_bb_adap);
+		if (dev->fe)
+			dev->fe->ops.set_voltage = dm1105_set_voltage;
+		break;
 	case DM1105_BOARD_DVBWORLD_2004:
 		dev->fe = dvb_attach(
 			cx24116_attach, &serit_sp2633_config,
@@ -870,11 +1047,32 @@ static int __devinit dm1105_probe(struct pci_dev *pdev,
 	if (ret < 0)
 		goto err_dm1105_hw_exit;
 
+	i2c_set_adapdata(&dev->i2c_bb_adap, dev);
+	strcpy(dev->i2c_bb_adap.name, DM1105_I2C_GPIO_NAME);
+	dev->i2c_bb_adap.owner = THIS_MODULE;
+	dev->i2c_bb_adap.dev.parent = &pdev->dev;
+	dev->i2c_bb_adap.algo_data = &dev->i2c_bit;
+	dev->i2c_bit.data = dev;
+	dev->i2c_bit.setsda = dm1105_setsda;
+	dev->i2c_bit.setscl = dm1105_setscl;
+	dev->i2c_bit.getsda = dm1105_getsda;
+	dev->i2c_bit.getscl = dm1105_getscl;
+	dev->i2c_bit.udelay = 10;
+	dev->i2c_bit.timeout = 10;
+
+	/* Raise SCL and SDA */
+	dm1105_setsda(dev, 1);
+	dm1105_setscl(dev, 1);
+
+	ret = i2c_bit_add_bus(&dev->i2c_bb_adap);
+	if (ret < 0)
+		goto err_i2c_del_adapter;
+
 	/* dvb */
 	ret = dvb_register_adapter(&dev->dvb_adapter, DRIVER_NAME,
 					THIS_MODULE, &pdev->dev, adapter_nr);
 	if (ret < 0)
-		goto err_i2c_del_adapter;
+		goto err_i2c_del_adapters;
 
 	dvb_adapter = &dev->dvb_adapter;
 
@@ -952,6 +1150,8 @@ static int __devinit dm1105_probe(struct pci_dev *pdev,
 	dvb_dmx_release(dvbdemux);
 err_dvb_unregister_adapter:
 	dvb_unregister_adapter(dvb_adapter);
+err_i2c_del_adapters:
+	i2c_del_adapter(&dev->i2c_bb_adap);
 err_i2c_del_adapter:
 	i2c_del_adapter(&dev->i2c_adap);
 err_dm1105_hw_exit: