diff options
Diffstat (limited to 'drivers/usb/gadget/mv_udc_phy.c')
| -rw-r--r-- | drivers/usb/gadget/mv_udc_phy.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/usb/gadget/mv_udc_phy.c b/drivers/usb/gadget/mv_udc_phy.c new file mode 100644 index 000000000000..d4dea97e38a5 --- /dev/null +++ b/drivers/usb/gadget/mv_udc_phy.c @@ -0,0 +1,214 @@ +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/io.h> +#include <linux/errno.h> + +#include <mach/cputype.h> + +#ifdef CONFIG_ARCH_MMP + +#define UTMI_REVISION 0x0 +#define UTMI_CTRL 0x4 +#define UTMI_PLL 0x8 +#define UTMI_TX 0xc +#define UTMI_RX 0x10 +#define UTMI_IVREF 0x14 +#define UTMI_T0 0x18 +#define UTMI_T1 0x1c +#define UTMI_T2 0x20 +#define UTMI_T3 0x24 +#define UTMI_T4 0x28 +#define UTMI_T5 0x2c +#define UTMI_RESERVE 0x30 +#define UTMI_USB_INT 0x34 +#define UTMI_DBG_CTL 0x38 +#define UTMI_OTG_ADDON 0x3c + +/* For UTMICTRL Register */ +#define UTMI_CTRL_USB_CLK_EN (1 << 31) +/* pxa168 */ +#define UTMI_CTRL_SUSPEND_SET1 (1 << 30) +#define UTMI_CTRL_SUSPEND_SET2 (1 << 29) +#define UTMI_CTRL_RXBUF_PDWN (1 << 24) +#define UTMI_CTRL_TXBUF_PDWN (1 << 11) + +#define UTMI_CTRL_INPKT_DELAY_SHIFT 30 +#define UTMI_CTRL_INPKT_DELAY_SOF_SHIFT 28 +#define UTMI_CTRL_PU_REF_SHIFT 20 +#define UTMI_CTRL_ARC_PULLDN_SHIFT 12 +#define UTMI_CTRL_PLL_PWR_UP_SHIFT 1 +#define UTMI_CTRL_PWR_UP_SHIFT 0 +/* For UTMI_PLL Register */ +#define UTMI_PLL_CLK_BLK_EN_SHIFT 24 +#define UTMI_PLL_FBDIV_SHIFT 4 +#define UTMI_PLL_REFDIV_SHIFT 0 +#define UTMI_PLL_FBDIV_MASK 0x00000FF0 +#define UTMI_PLL_REFDIV_MASK 0x0000000F +#define UTMI_PLL_ICP_MASK 0x00007000 +#define UTMI_PLL_KVCO_MASK 0x00031000 +#define UTMI_PLL_PLLCALI12_SHIFT 29 +#define UTMI_PLL_PLLCALI12_MASK (0x3 << 29) +#define UTMI_PLL_PLLVDD18_SHIFT 27 +#define UTMI_PLL_PLLVDD18_MASK (0x3 << 27) +#define UTMI_PLL_PLLVDD12_SHIFT 25 +#define UTMI_PLL_PLLVDD12_MASK (0x3 << 25) +#define UTMI_PLL_KVCO_SHIFT 15 +#define UTMI_PLL_ICP_SHIFT 12 +/* For UTMI_TX Register */ +#define UTMI_TX_REG_EXT_FS_RCAL_SHIFT 27 +#define UTMI_TX_REG_EXT_FS_RCAL_MASK (0xf << 27) +#define UTMI_TX_REG_EXT_FS_RCAL_EN_MASK 26 +#define UTMI_TX_REG_EXT_FS_RCAL_EN (0x1 << 26) +#define UTMI_TX_LOW_VDD_EN_SHIFT 11 +#define UTMI_TX_IMPCAL_VTH_SHIFT 14 +#define UTMI_TX_IMPCAL_VTH_MASK (0x7 << 14) +#define UTMI_TX_CK60_PHSEL_SHIFT 17 +#define UTMI_TX_CK60_PHSEL_MASK (0xf << 17) +#define UTMI_TX_TXVDD12_SHIFT 22 +#define UTMI_TX_TXVDD12_MASK (0x3 << 22) +#define UTMI_TX_AMP_SHIFT 0 +#define UTMI_TX_AMP_MASK (0x7 << 0) +/* For UTMI_RX Register */ +#define UTMI_RX_SQ_THRESH_SHIFT 4 +#define UTMI_RX_SQ_THRESH_MASK (0xf << 4) +#define UTMI_REG_SQ_LENGTH_SHIFT 15 +#define UTMI_REG_SQ_LENGTH_MASK (0x3 << 15) + +#define REG_RCAL_START 0x00001000 +#define VCOCAL_START 0x00200000 +#define KVCO_EXT 0x00400000 +#define PLL_READY 0x00800000 +#define CLK_BLK_EN 0x01000000 +#endif + +static unsigned int u2o_read(unsigned int base, unsigned int offset) +{ + return readl(base + offset); +} + +static void u2o_set(unsigned int base, unsigned int offset, unsigned int value) +{ + unsigned int reg; + + reg = readl(base + offset); + reg |= value; + writel(reg, base + offset); + readl(base + offset); +} + +static void u2o_clear(unsigned int base, unsigned int offset, + unsigned int value) +{ + unsigned int reg; + + reg = readl(base + offset); + reg &= ~value; + writel(reg, base + offset); + readl(base + offset); +} + +static void u2o_write(unsigned int base, unsigned int offset, + unsigned int value) +{ + writel(value, base + offset); + readl(base + offset); +} + +#ifdef CONFIG_ARCH_MMP +int mv_udc_phy_init(unsigned int base) +{ + unsigned long timeout; + + /* Initialize the USB PHY power */ + if (cpu_is_pxa910()) { + u2o_set(base, UTMI_CTRL, (1 << UTMI_CTRL_INPKT_DELAY_SOF_SHIFT) + | (1 << UTMI_CTRL_PU_REF_SHIFT)); + } + + u2o_set(base, UTMI_CTRL, 1 << UTMI_CTRL_PLL_PWR_UP_SHIFT); + u2o_set(base, UTMI_CTRL, 1 << UTMI_CTRL_PWR_UP_SHIFT); + + /* UTMI_PLL settings */ + u2o_clear(base, UTMI_PLL, UTMI_PLL_PLLVDD18_MASK + | UTMI_PLL_PLLVDD12_MASK | UTMI_PLL_PLLCALI12_MASK + | UTMI_PLL_FBDIV_MASK | UTMI_PLL_REFDIV_MASK + | UTMI_PLL_ICP_MASK | UTMI_PLL_KVCO_MASK); + + u2o_set(base, UTMI_PLL, (0xee << UTMI_PLL_FBDIV_SHIFT) + | (0xb << UTMI_PLL_REFDIV_SHIFT) + | (3 << UTMI_PLL_PLLVDD18_SHIFT) + | (3 << UTMI_PLL_PLLVDD12_SHIFT) + | (3 << UTMI_PLL_PLLCALI12_SHIFT) + | (1 << UTMI_PLL_ICP_SHIFT) | (3 << UTMI_PLL_KVCO_SHIFT)); + + /* UTMI_TX */ + u2o_clear(base, UTMI_TX, UTMI_TX_REG_EXT_FS_RCAL_EN_MASK + | UTMI_TX_TXVDD12_MASK + | UTMI_TX_CK60_PHSEL_MASK | UTMI_TX_IMPCAL_VTH_MASK + | UTMI_TX_REG_EXT_FS_RCAL_MASK | UTMI_TX_AMP_MASK); + u2o_set(base, UTMI_TX, (3 << UTMI_TX_TXVDD12_SHIFT) + | (4 << UTMI_TX_CK60_PHSEL_SHIFT) + | (4 << UTMI_TX_IMPCAL_VTH_SHIFT) + | (8 << UTMI_TX_REG_EXT_FS_RCAL_SHIFT) + | (3 << UTMI_TX_AMP_SHIFT)); + + /* UTMI_RX */ + u2o_clear(base, UTMI_RX, UTMI_RX_SQ_THRESH_MASK + | UTMI_REG_SQ_LENGTH_MASK); + if (cpu_is_pxa168()) + u2o_set(base, UTMI_RX, (7 << UTMI_RX_SQ_THRESH_SHIFT) + | (2 << UTMI_REG_SQ_LENGTH_SHIFT)); + else + u2o_set(base, UTMI_RX, (0x7 << UTMI_RX_SQ_THRESH_SHIFT) + | (2 << UTMI_REG_SQ_LENGTH_SHIFT)); + + /* UTMI_IVREF */ + if (cpu_is_pxa168()) + /* + * fixing Microsoft Altair board interface with NEC hub issue - + * Set UTMI_IVREF from 0x4a3 to 0x4bf + */ + u2o_write(base, UTMI_IVREF, 0x4bf); + + /* calibrate */ + timeout = jiffies + 100; + while ((u2o_read(base, UTMI_PLL) & PLL_READY) == 0) { + if (time_after(jiffies, timeout)) + return -ETIME; + cpu_relax(); + } + + /* toggle VCOCAL_START bit of UTMI_PLL */ + udelay(200); + u2o_set(base, UTMI_PLL, VCOCAL_START); + udelay(40); + u2o_clear(base, UTMI_PLL, VCOCAL_START); + + /* toggle REG_RCAL_START bit of UTMI_TX */ + udelay(200); + u2o_set(base, UTMI_TX, REG_RCAL_START); + udelay(40); + u2o_clear(base, UTMI_TX, REG_RCAL_START); + udelay(200); + + /* make sure phy is ready */ + timeout = jiffies + 100; + while ((u2o_read(base, UTMI_PLL) & PLL_READY) == 0) { + if (time_after(jiffies, timeout)) + return -ETIME; + cpu_relax(); + } + + if (cpu_is_pxa168()) { + u2o_set(base, UTMI_RESERVE, 1 << 5); + /* Turn on UTMI PHY OTG extension */ + u2o_write(base, UTMI_OTG_ADDON, 1); + } + return 0; +} +#else +int mv_udc_phy_init(unsigned int base) +{ + return 0; +} +#endif |