rt2x00: rt2800lib: add RFCSR register initialization for RT3593

Based on the Ralink DPO_RT5572_LinuxSTA_2.6.0.1_20120629
driver.

References:
  NICInitRT3593RFRegisters in chips/rt3593.c
  RT3593LoadRFNormalModeSetup in chips/rt3593.c

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 53ebdb9..b650569 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -4963,6 +4963,42 @@ static void rt2800_normal_mode_setup_3xxx(struct rt2x00_dev *rt2x00dev)
 	}
 }
 
+static void rt2800_normal_mode_setup_3593(struct rt2x00_dev *rt2x00dev)
+{
+	struct rt2800_drv_data *drv_data = rt2x00dev->drv_data;
+	u8 rfcsr;
+	u8 tx_gain;
+
+	rt2800_rfcsr_read(rt2x00dev, 50, &rfcsr);
+	rt2x00_set_field8(&rfcsr, RFCSR50_TX_LO2_EN, 0);
+	rt2800_rfcsr_write(rt2x00dev, 50, rfcsr);
+
+	rt2800_rfcsr_read(rt2x00dev, 51, &rfcsr);
+	tx_gain = rt2x00_get_field8(drv_data->txmixer_gain_24g,
+				    RFCSR17_TXMIXER_GAIN);
+	rt2x00_set_field8(&rfcsr, RFCSR51_BITS24, tx_gain);
+	rt2800_rfcsr_write(rt2x00dev, 51, rfcsr);
+
+	rt2800_rfcsr_read(rt2x00dev, 38, &rfcsr);
+	rt2x00_set_field8(&rfcsr, RFCSR38_RX_LO1_EN, 0);
+	rt2800_rfcsr_write(rt2x00dev, 38, rfcsr);
+
+	rt2800_rfcsr_read(rt2x00dev, 39, &rfcsr);
+	rt2x00_set_field8(&rfcsr, RFCSR39_RX_LO2_EN, 0);
+	rt2800_rfcsr_write(rt2x00dev, 39, rfcsr);
+
+	rt2800_rfcsr_read(rt2x00dev, 1, &rfcsr);
+	rt2x00_set_field8(&rfcsr, RFCSR1_RF_BLOCK_EN, 1);
+	rt2x00_set_field8(&rfcsr, RFCSR1_PLL_PD, 1);
+	rt2800_rfcsr_write(rt2x00dev, 1, rfcsr);
+
+	rt2800_rfcsr_read(rt2x00dev, 30, &rfcsr);
+	rt2x00_set_field8(&rfcsr, RFCSR30_RX_VCM, 2);
+	rt2800_rfcsr_write(rt2x00dev, 30, rfcsr);
+
+	/* TODO: enable stream mode */
+}
+
 static void rt2800_normal_mode_setup_5xxx(struct rt2x00_dev *rt2x00dev)
 {
 	u8 reg;
@@ -5345,6 +5381,89 @@ static void rt2800_init_rfcsr_3572(struct rt2x00_dev *rt2x00dev)
 	rt2800_normal_mode_setup_3xxx(rt2x00dev);
 }
 
+static void rt2800_init_rfcsr_3593(struct rt2x00_dev *rt2x00dev)
+{
+	struct rt2800_drv_data *drv_data = rt2x00dev->drv_data;
+	u32 reg;
+	u8 rfcsr;
+
+	/* Disable GPIO #4 and #7 function for LAN PE control */
+	rt2800_register_read(rt2x00dev, GPIO_SWITCH, &reg);
+	rt2x00_set_field32(&reg, GPIO_SWITCH_4, 0);
+	rt2x00_set_field32(&reg, GPIO_SWITCH_7, 0);
+	rt2800_register_write(rt2x00dev, GPIO_SWITCH, reg);
+
+	/* Initialize default register values */
+	rt2800_rfcsr_write(rt2x00dev, 1, 0x03);
+	rt2800_rfcsr_write(rt2x00dev, 3, 0x80);
+	rt2800_rfcsr_write(rt2x00dev, 5, 0x00);
+	rt2800_rfcsr_write(rt2x00dev, 6, 0x40);
+	rt2800_rfcsr_write(rt2x00dev, 8, 0xf1);
+	rt2800_rfcsr_write(rt2x00dev, 9, 0x02);
+	rt2800_rfcsr_write(rt2x00dev, 10, 0xd3);
+	rt2800_rfcsr_write(rt2x00dev, 11, 0x40);
+	rt2800_rfcsr_write(rt2x00dev, 12, 0x4e);
+	rt2800_rfcsr_write(rt2x00dev, 13, 0x12);
+	rt2800_rfcsr_write(rt2x00dev, 18, 0x40);
+	rt2800_rfcsr_write(rt2x00dev, 22, 0x20);
+	rt2800_rfcsr_write(rt2x00dev, 30, 0x10);
+	rt2800_rfcsr_write(rt2x00dev, 31, 0x80);
+	rt2800_rfcsr_write(rt2x00dev, 32, 0x78);
+	rt2800_rfcsr_write(rt2x00dev, 33, 0x3b);
+	rt2800_rfcsr_write(rt2x00dev, 34, 0x3c);
+	rt2800_rfcsr_write(rt2x00dev, 35, 0xe0);
+	rt2800_rfcsr_write(rt2x00dev, 38, 0x86);
+	rt2800_rfcsr_write(rt2x00dev, 39, 0x23);
+	rt2800_rfcsr_write(rt2x00dev, 44, 0xd3);
+	rt2800_rfcsr_write(rt2x00dev, 45, 0xbb);
+	rt2800_rfcsr_write(rt2x00dev, 46, 0x60);
+	rt2800_rfcsr_write(rt2x00dev, 49, 0x8e);
+	rt2800_rfcsr_write(rt2x00dev, 50, 0x86);
+	rt2800_rfcsr_write(rt2x00dev, 51, 0x75);
+	rt2800_rfcsr_write(rt2x00dev, 52, 0x45);
+	rt2800_rfcsr_write(rt2x00dev, 53, 0x18);
+	rt2800_rfcsr_write(rt2x00dev, 54, 0x18);
+	rt2800_rfcsr_write(rt2x00dev, 55, 0x18);
+	rt2800_rfcsr_write(rt2x00dev, 56, 0xdb);
+	rt2800_rfcsr_write(rt2x00dev, 57, 0x6e);
+
+	/* Initiate calibration */
+	/* TODO: use rt2800_rf_init_calibration ? */
+	rt2800_rfcsr_read(rt2x00dev, 2, &rfcsr);
+	rt2x00_set_field8(&rfcsr, RFCSR2_RESCAL_EN, 1);
+	rt2800_rfcsr_write(rt2x00dev, 2, rfcsr);
+
+	rt2800_adjust_freq_offset(rt2x00dev);
+
+	rt2800_rfcsr_read(rt2x00dev, 18, &rfcsr);
+	rt2x00_set_field8(&rfcsr, RFCSR18_XO_TUNE_BYPASS, 1);
+	rt2800_rfcsr_write(rt2x00dev, 18, rfcsr);
+
+	rt2800_register_read(rt2x00dev, LDO_CFG0, &reg);
+	rt2x00_set_field32(&reg, LDO_CFG0_LDO_CORE_VLEVEL, 3);
+	rt2x00_set_field32(&reg, LDO_CFG0_BGSEL, 1);
+	rt2800_register_write(rt2x00dev, LDO_CFG0, reg);
+	usleep_range(1000, 1500);
+	rt2800_register_read(rt2x00dev, LDO_CFG0, &reg);
+	rt2x00_set_field32(&reg, LDO_CFG0_LDO_CORE_VLEVEL, 0);
+	rt2800_register_write(rt2x00dev, LDO_CFG0, reg);
+
+	/* Set initial values for RX filter calibration */
+	drv_data->calibration_bw20 = 0x1f;
+	drv_data->calibration_bw40 = 0x2f;
+
+	/* Save BBP 25 & 26 values for later use in channel switching */
+	rt2800_bbp_read(rt2x00dev, 25, &drv_data->bbp25);
+	rt2800_bbp_read(rt2x00dev, 26, &drv_data->bbp26);
+
+	rt2800_led_open_drain_enable(rt2x00dev);
+	rt2800_normal_mode_setup_3593(rt2x00dev);
+
+	/* TODO: post BBP initialization */
+
+	/* TODO: enable stream mode support */
+}
+
 static void rt2800_init_rfcsr_5390(struct rt2x00_dev *rt2x00dev)
 {
 	rt2800_rf_init_calibration(rt2x00dev, 2);
@@ -5573,6 +5692,9 @@ static void rt2800_init_rfcsr(struct rt2x00_dev *rt2x00dev)
 	case RT3572:
 		rt2800_init_rfcsr_3572(rt2x00dev);
 		break;
+	case RT3593:
+		rt2800_init_rfcsr_3593(rt2x00dev);
+		break;
 	case RT5390:
 		rt2800_init_rfcsr_5390(rt2x00dev);
 		break;