diff options
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/ehci-tegra.c | 300 |
1 files changed, 266 insertions, 34 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index 554145a25..a9603bc10 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -1,6 +1,6 @@ /* * Copyright (c) 2011 The Chromium OS Authors. - * Copyright (c) 2009-2012 NVIDIA Corporation + * Copyright (c) 2009-2013 NVIDIA Corporation * Copyright (c) 2013 Lucas Stach * * See file CREDITS for list of people who contributed to this @@ -28,6 +28,8 @@ #include <asm-generic/gpio.h> #include <asm/arch/clock.h> #include <asm/arch-tegra/usb.h> +#include <asm/arch-tegra/clk_rst.h> +#include <asm/arch/usb.h> #include <usb.h> #include <usb/ulpi.h> #include <libfdt.h> @@ -35,6 +37,11 @@ #include "ehci.h" +#define USB1_ADDR_MASK 0xFFFF0000 + +#define HOSTPC1_DEVLC 0x84 +#define HOSTPC1_PSPD(x) (((x) >> 25) & 0x3) + #ifdef CONFIG_USB_ULPI #ifndef CONFIG_USB_ULPI_VIEWPORT #error "To use CONFIG_USB_ULPI on Tegra Boards you have to also \ @@ -87,6 +94,8 @@ struct fdt_usb { static struct fdt_usb port[USB_PORTS_MAX]; /* List of valid USB ports */ static unsigned port_count; /* Number of available ports */ +/* Port that needs to clear CSC after Port Reset */ +static u32 port_addr_clear_csc; /* * This table has USB timing parameters for each Oscillator frequency we @@ -129,7 +138,7 @@ static unsigned port_count; /* Number of available ports */ * * 4. The 20 microsecond delay after bias cell operation. */ -static const unsigned usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = { +static const unsigned T20_usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = { /* DivN, DivM, DivP, CPCON, LFCON, Delays Debounce, Bias */ { 0x3C0, 0x0D, 0x00, 0xC, 0, 0x02, 0x33, 0x05, 0x7F, 0x7EF4, 5 }, { 0x0C8, 0x04, 0x00, 0x3, 0, 0x03, 0x4B, 0x06, 0xBB, 0xBB80, 7 }, @@ -137,6 +146,22 @@ static const unsigned usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = { { 0x3C0, 0x1A, 0x00, 0xC, 0, 0x04, 0x66, 0x09, 0xFE, 0xFDE8, 9 } }; +static const unsigned T30_usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = { + /* DivN, DivM, DivP, CPCON, LFCON, Delays Debounce, Bias */ + { 0x3C0, 0x0D, 0x00, 0xC, 1, 0x02, 0x33, 0x09, 0x7F, 0x7EF4, 5 }, + { 0x0C8, 0x04, 0x00, 0x3, 0, 0x03, 0x4B, 0x0C, 0xBB, 0xBB80, 7 }, + { 0x3C0, 0x0C, 0x00, 0xC, 1, 0x02, 0x2F, 0x08, 0x76, 0x7530, 5 }, + { 0x3C0, 0x1A, 0x00, 0xC, 1, 0x04, 0x66, 0x09, 0xFE, 0xFDE8, 9 } +}; + +static const unsigned T114_usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = { + /* DivN, DivM, DivP, CPCON, LFCON, Delays Debounce, Bias */ + { 0x3C0, 0x0D, 0x00, 0xC, 2, 0x02, 0x33, 0x09, 0x7F, 0x7EF4, 6 }, + { 0x0C8, 0x04, 0x00, 0x3, 2, 0x03, 0x4B, 0x0C, 0xBB, 0xBB80, 8 }, + { 0x3C0, 0x0C, 0x00, 0xC, 2, 0x02, 0x2F, 0x08, 0x76, 0x7530, 5 }, + { 0x3C0, 0x1A, 0x00, 0xC, 2, 0x04, 0x66, 0x09, 0xFE, 0xFDE8, 0xB } +}; + /* UTMIP Idle Wait Delay */ static const u8 utmip_idle_wait_delay = 17; @@ -146,6 +171,33 @@ static const u8 utmip_elastic_limit = 16; /* UTMIP High Speed Sync Start Delay */ static const u8 utmip_hs_sync_start_delay = 9; +struct fdt_usb_controller { + int compat; + /* flag to determine whether controller supports hostpc register */ + u32 has_hostpc:1; + const unsigned *pll_parameter; +}; + +static struct fdt_usb_controller fdt_usb_controllers[] = { + { + .compat = COMPAT_NVIDIA_TEGRA20_USB, + .has_hostpc = 0, + .pll_parameter = (const unsigned *)T20_usb_pll, + }, + { + .compat = COMPAT_NVIDIA_TEGRA30_USB, + .has_hostpc = 1, + .pll_parameter = (const unsigned *)T30_usb_pll, + }, + { + .compat = COMPAT_NVIDIA_TEGRA114_USB, + .has_hostpc = 1, + .pll_parameter = (const unsigned *)T114_usb_pll, + }, +}; + +static struct fdt_usb_controller *controller; + /* * A known hardware issue where Connect Status Change bit of PORTSC register * of USB1 controller will be set after Port Reset. @@ -156,13 +208,52 @@ static const u8 utmip_hs_sync_start_delay = 9; void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg) { mdelay(50); - if (((u32) status_reg & TEGRA_USB_ADDR_MASK) != TEGRA_USB1_BASE) + /* This is to avoid PORT_ENABLE bit to be cleared in "ehci-hcd.c". */ + if (controller->has_hostpc) + *reg |= EHCI_PS_PE; + + if (((u32)status_reg & TEGRA_USB_ADDR_MASK) != port_addr_clear_csc) return; /* For EHCI_PS_CSC to be cleared in ehci_hcd.c */ if (ehci_readl(status_reg) & EHCI_PS_CSC) *reg |= EHCI_PS_CSC; } +/* + * This ehci_set_usbmode overrides the weak function ehci_set_usbmode + * in "ehci-hcd.c". + */ +void ehci_set_usbmode(int index) +{ + struct fdt_usb *config; + struct usb_ctlr *usbctlr; + uint32_t tmp; + + config = &port[index]; + usbctlr = config->reg; + + tmp = ehci_readl(&usbctlr->usb_mode); + tmp |= USBMODE_CM_HC; + ehci_writel(&usbctlr->usb_mode, tmp); +} + +/* + * This ehci_get_port_speed overrides the weak function ehci_get_port_speed + * in "ehci-hcd.c". + */ +int ehci_get_port_speed(struct ehci_hcor *hcor, uint32_t reg) +{ + uint32_t tmp; + uint32_t *reg_ptr; + + if (controller->has_hostpc) { + reg_ptr = (uint32_t *)((u8 *)&hcor->or_usbcmd + HOSTPC1_DEVLC); + tmp = ehci_readl(reg_ptr); + return HOSTPC1_PSPD(tmp); + } else + return PORTSC_PSPD(reg); +} + /* Put the port into host mode */ static void set_host_mode(struct fdt_usb *config) { @@ -209,6 +300,16 @@ void usbf_reset_controller(struct fdt_usb *config, struct usb_ctlr *usbctlr) setbits_le32(&usbctlr->susp_ctrl, UTMIP_PHY_ENB); } +static const unsigned *get_pll_timing(void) +{ + const unsigned *timing; + + timing = controller->pll_parameter + + clock_get_osc_freq() * PARAM_COUNT; + + return timing; +} + /* set up the UTMI USB controller with the parameters provided */ static int init_utmi_usb_controller(struct fdt_usb *config) { @@ -216,6 +317,8 @@ static int init_utmi_usb_controller(struct fdt_usb *config) int loop_count; const unsigned *timing; struct usb_ctlr *usbctlr = config->reg; + struct clk_rst_ctlr *clkrst; + struct usb_ctlr *usb1ctlr; clock_enable(config->periph_id); @@ -232,35 +335,97 @@ static int init_utmi_usb_controller(struct fdt_usb *config) * To Use the A Session Valid for cable detection logic, VBUS_WAKEUP * mux must be switched to actually use a_sess_vld threshold. */ - if (fdt_gpio_isvalid(&config->vbus_gpio)) { + if (config->dr_mode == DR_MODE_OTG && + fdt_gpio_isvalid(&config->vbus_gpio)) clrsetbits_le32(&usbctlr->usb1_legacy_ctrl, VBUS_SENSE_CTL_MASK, VBUS_SENSE_CTL_A_SESS_VLD << VBUS_SENSE_CTL_SHIFT); - } /* * PLL Delay CONFIGURATION settings. The following parameters control * the bring up of the plls. */ - timing = usb_pll[clock_get_osc_freq()]; + timing = get_pll_timing(); + + if (!controller->has_hostpc) { + val = readl(&usbctlr->utmip_misc_cfg1); + clrsetbits_le32(&val, UTMIP_PLLU_STABLE_COUNT_MASK, + timing[PARAM_STABLE_COUNT] << + UTMIP_PLLU_STABLE_COUNT_SHIFT); + clrsetbits_le32(&val, UTMIP_PLL_ACTIVE_DLY_COUNT_MASK, + timing[PARAM_ACTIVE_DELAY_COUNT] << + UTMIP_PLL_ACTIVE_DLY_COUNT_SHIFT); + writel(val, &usbctlr->utmip_misc_cfg1); + + /* Set PLL enable delay count and crystal frequency count */ + val = readl(&usbctlr->utmip_pll_cfg1); + clrsetbits_le32(&val, UTMIP_PLLU_ENABLE_DLY_COUNT_MASK, + timing[PARAM_ENABLE_DELAY_COUNT] << + UTMIP_PLLU_ENABLE_DLY_COUNT_SHIFT); + clrsetbits_le32(&val, UTMIP_XTAL_FREQ_COUNT_MASK, + timing[PARAM_XTAL_FREQ_COUNT] << + UTMIP_XTAL_FREQ_COUNT_SHIFT); + writel(val, &usbctlr->utmip_pll_cfg1); + } else { + clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; + + val = readl(&clkrst->crc_utmip_pll_cfg2); + clrsetbits_le32(&val, UTMIP_PLLU_STABLE_COUNT_MASK, + timing[PARAM_STABLE_COUNT] << + UTMIP_PLLU_STABLE_COUNT_SHIFT); + clrsetbits_le32(&val, UTMIP_PLL_ACTIVE_DLY_COUNT_MASK, + timing[PARAM_ACTIVE_DELAY_COUNT] << + UTMIP_PLL_ACTIVE_DLY_COUNT_SHIFT); + writel(val, &clkrst->crc_utmip_pll_cfg2); + + /* Set PLL enable delay count and crystal frequency count */ + val = readl(&clkrst->crc_utmip_pll_cfg1); + clrsetbits_le32(&val, UTMIP_PLLU_ENABLE_DLY_COUNT_MASK, + timing[PARAM_ENABLE_DELAY_COUNT] << + UTMIP_PLLU_ENABLE_DLY_COUNT_SHIFT); + clrsetbits_le32(&val, UTMIP_XTAL_FREQ_COUNT_MASK, + timing[PARAM_XTAL_FREQ_COUNT] << + UTMIP_XTAL_FREQ_COUNT_SHIFT); + writel(val, &clkrst->crc_utmip_pll_cfg1); - val = readl(&usbctlr->utmip_misc_cfg1); - clrsetbits_le32(&val, UTMIP_PLLU_STABLE_COUNT_MASK, - timing[PARAM_STABLE_COUNT] << UTMIP_PLLU_STABLE_COUNT_SHIFT); - clrsetbits_le32(&val, UTMIP_PLL_ACTIVE_DLY_COUNT_MASK, - timing[PARAM_ACTIVE_DELAY_COUNT] << - UTMIP_PLL_ACTIVE_DLY_COUNT_SHIFT); - writel(val, &usbctlr->utmip_misc_cfg1); + /* Disable Power Down state for PLL */ + clrbits_le32(&clkrst->crc_utmip_pll_cfg1, + PLLU_POWERDOWN | PLL_ENABLE_POWERDOWN | + PLL_ACTIVE_POWERDOWN); - /* Set PLL enable delay count and crystal frequency count */ - val = readl(&usbctlr->utmip_pll_cfg1); - clrsetbits_le32(&val, UTMIP_PLLU_ENABLE_DLY_COUNT_MASK, - timing[PARAM_ENABLE_DELAY_COUNT] << - UTMIP_PLLU_ENABLE_DLY_COUNT_SHIFT); - clrsetbits_le32(&val, UTMIP_XTAL_FREQ_COUNT_MASK, - timing[PARAM_XTAL_FREQ_COUNT] << - UTMIP_XTAL_FREQ_COUNT_SHIFT); - writel(val, &usbctlr->utmip_pll_cfg1); + /* Recommended PHY settings for EYE diagram */ + val = readl(&usbctlr->utmip_xcvr_cfg0); + clrsetbits_le32(&val, UTMIP_XCVR_SETUP_MASK, + 0x4 << UTMIP_XCVR_SETUP_SHIFT); + clrsetbits_le32(&val, UTMIP_XCVR_SETUP_MSB_MASK, + 0x3 << UTMIP_XCVR_SETUP_MSB_SHIFT); + clrsetbits_le32(&val, UTMIP_XCVR_HSSLEW_MSB_MASK, + 0x8 << UTMIP_XCVR_HSSLEW_MSB_SHIFT); + writel(val, &usbctlr->utmip_xcvr_cfg0); + clrsetbits_le32(&usbctlr->utmip_xcvr_cfg1, + UTMIP_XCVR_TERM_RANGE_ADJ_MASK, + 0x7 << UTMIP_XCVR_TERM_RANGE_ADJ_SHIFT); + + /* Some registers can be controlled from USB1 only. */ + if (config->periph_id != PERIPH_ID_USBD) { + clock_enable(PERIPH_ID_USBD); + /* Disable Reset if in Reset state */ + reset_set_enable(PERIPH_ID_USBD, 0); + } + usb1ctlr = (struct usb_ctlr *) + ((u32)config->reg & USB1_ADDR_MASK); + val = readl(&usb1ctlr->utmip_bias_cfg0); + setbits_le32(&val, UTMIP_HSDISCON_LEVEL_MSB); + clrsetbits_le32(&val, UTMIP_HSDISCON_LEVEL_MASK, + 0x1 << UTMIP_HSDISCON_LEVEL_SHIFT); + clrsetbits_le32(&val, UTMIP_HSSQUELCH_LEVEL_MASK, + 0x2 << UTMIP_HSSQUELCH_LEVEL_SHIFT); + writel(val, &usb1ctlr->utmip_bias_cfg0); + + /* Miscellaneous setting mentioned in Programming Guide */ + clrbits_le32(&usbctlr->utmip_misc_cfg0, + UTMIP_SUSPEND_EXIT_ON_EDGE); + } /* Setting the tracking length time */ clrsetbits_le32(&usbctlr->utmip_bias_cfg1, @@ -308,6 +473,14 @@ static int init_utmi_usb_controller(struct fdt_usb *config) /* Resuscitate crystal clock by setting UTMIP_PHY_XTAL_CLOCKEN */ setbits_le32(&usbctlr->utmip_misc_cfg1, UTMIP_PHY_XTAL_CLOCKEN); + if (controller->has_hostpc) { + if (config->periph_id == PERIPH_ID_USBD) + clrbits_le32(&clkrst->crc_utmip_pll_cfg2, + UTMIP_FORCE_PD_SAMP_A_POWERDOWN); + if (config->periph_id == PERIPH_ID_USB3) + clrbits_le32(&clkrst->crc_utmip_pll_cfg2, + UTMIP_FORCE_PD_SAMP_C_POWERDOWN); + } /* Finished the per-controller init. */ /* De-assert UTMIP_RESET to bring out of reset. */ @@ -336,6 +509,18 @@ static int init_utmi_usb_controller(struct fdt_usb *config) clrbits_le32(&usbctlr->utmip_xcvr_cfg1, UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN | UTMIP_FORCE_PDDR_POWERDOWN); + if (controller->has_hostpc) { + /* + * BIAS Pad Power Down is common among all 3 USB + * controllers and can be controlled from USB1 only. + */ + usb1ctlr = (struct usb_ctlr *) + ((u32)config->reg & USB1_ADDR_MASK); + clrbits_le32(&usb1ctlr->utmip_bias_cfg0, UTMIP_BIASPD); + udelay(25); + clrbits_le32(&usb1ctlr->utmip_bias_cfg1, + UTMIP_FORCE_PDTRK_POWERDOWN); + } return 0; } @@ -438,7 +623,7 @@ static void config_clock(const u32 timing[]) timing[PARAM_CPCON], timing[PARAM_LFCON]); } -int fdt_decode_usb(const void *blob, int node, struct fdt_usb *config) +static int fdt_decode_usb(const void *blob, int node, struct fdt_usb *config) { const char *phy, *mode; @@ -466,6 +651,8 @@ int fdt_decode_usb(const void *blob, int node, struct fdt_usb *config) config->enabled = fdtdec_get_is_enabled(blob, node); config->has_legacy_mode = fdtdec_get_bool(blob, node, "nvidia,has-legacy-mode"); + if (config->has_legacy_mode) + port_addr_clear_csc = (u32) config->reg; config->periph_id = clock_decode_periph_id(blob, node); if (config->periph_id == PERIPH_ID_NONE) { debug("%s: Missing/invalid peripheral ID\n", __func__); @@ -483,20 +670,22 @@ int fdt_decode_usb(const void *blob, int node, struct fdt_usb *config) return 0; } -int board_usb_init(const void *blob) +/* + * process_usb_nodes() - Process a list of USB nodes, adding them to our list + * of USB ports. + * @blob: fdt blob + * @node_list: list of nodes to process (any <=0 are ignored) + * @count: number of nodes to process + * + * Return: 0 - ok, -1 - error + */ +static int process_usb_nodes(const void *blob, int node_list[], int count) { struct fdt_usb config; - enum clock_osc_freq freq; - int node_list[USB_PORTS_MAX]; - int node, count, i; + int node, i; + int clk_done = 0; - /* Set up the USB clocks correctly based on our oscillator frequency */ - freq = clock_get_osc_freq(); - config_clock(usb_pll[freq]); - - /* count may return <0 on error */ - count = fdtdec_find_aliases_for_id(blob, "usb", - COMPAT_NVIDIA_TEGRA20_USB, node_list, USB_PORTS_MAX); + port_count = 0; for (i = 0; i < count; i++) { if (port_count == USB_PORTS_MAX) { printf("tegrausb: Cannot register more than %d ports\n", @@ -513,6 +702,10 @@ int board_usb_init(const void *blob) fdt_get_name(blob, node, NULL)); return -1; } + if (!clk_done) { + config_clock(get_pll_timing()); + clk_done = 1; + } config.initialized = 0; /* add new USB port to the list of available ports */ @@ -522,6 +715,31 @@ int board_usb_init(const void *blob) return 0; } +int board_usb_init(const void *blob) +{ + int node_list[USB_PORTS_MAX]; + int count, err = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(fdt_usb_controllers); i++) { + controller = &fdt_usb_controllers[i]; + + count = fdtdec_find_aliases_for_id(blob, "usb", + controller->compat, node_list, USB_PORTS_MAX); + if (count) { + err = process_usb_nodes(blob, node_list, count); + if (err) + printf("%s: Error processing USB node!\n", + __func__); + return err; + } + } + if (i == ARRAY_SIZE(fdt_usb_controllers)) + controller = NULL; + + return err; +} + /** * Start up the given port number (ports are numbered from 0 on each board). * This returns values for the appropriate hccr and hcor addresses to use for @@ -564,6 +782,20 @@ success: usbctlr = config->reg; *hccr = (struct ehci_hccr *)&usbctlr->cap_length; *hcor = (struct ehci_hcor *)&usbctlr->usb_cmd; + + if (controller->has_hostpc) { + /* Set to Host mode after Controller Reset was done */ + clrsetbits_le32(&usbctlr->usb_mode, USBMODE_CM_HC, + USBMODE_CM_HC); + /* Select UTMI parallel interface after setting host mode */ + if (config->utmi) { + clrsetbits_le32((char *)&usbctlr->usb_cmd + + HOSTPC1_DEVLC, PTS_MASK, + PTS_UTMI << PTS_SHIFT); + clrbits_le32((char *)&usbctlr->usb_cmd + + HOSTPC1_DEVLC, STS); + } + } return 0; } |