* Copyright (C) 2008 Wind River Systems
*/
+#include <linux/delay.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/i2c.h>
#include <linux/usb.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <linux/of_fdt.h>
#include <linux/libfdt.h>
+#include <linux/usb/ehci_pdriver.h>
+#include <linux/usb/ohci_pdriver.h>
#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-rnm-defs.h>
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-helper-board.h>
+#include <asm/octeon/cvmx-uctlx-defs.h>
/* Octeon Random Number Generator. */
static int __init octeon_rng_device_init(void)
#ifdef CONFIG_USB
+static DEFINE_MUTEX(octeon2_usb_clocks_mutex);
+
+static int octeon2_usb_clock_start_cnt;
+
+static void octeon2_usb_clocks_start(void)
+{
+ u64 div;
+ union cvmx_uctlx_if_ena if_ena;
+ union cvmx_uctlx_clk_rst_ctl clk_rst_ctl;
+ union cvmx_uctlx_uphy_ctl_status uphy_ctl_status;
+ union cvmx_uctlx_uphy_portx_ctl_status port_ctl_status;
+ int i;
+ unsigned long io_clk_64_to_ns;
+
+
+ mutex_lock(&octeon2_usb_clocks_mutex);
+
+ octeon2_usb_clock_start_cnt++;
+ if (octeon2_usb_clock_start_cnt != 1)
+ goto exit;
+
+ io_clk_64_to_ns = 64000000000ull / octeon_get_io_clock_rate();
+
+ /*
+ * Step 1: Wait for voltages stable. That surely happened
+ * before starting the kernel.
+ *
+ * Step 2: Enable SCLK of UCTL by writing UCTL0_IF_ENA[EN] = 1
+ */
+ if_ena.u64 = 0;
+ if_ena.s.en = 1;
+ cvmx_write_csr(CVMX_UCTLX_IF_ENA(0), if_ena.u64);
+
+ /* Step 3: Configure the reference clock, PHY, and HCLK */
+ clk_rst_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_CLK_RST_CTL(0));
+
+ /*
+ * If the UCTL looks like it has already been started, skip
+ * the initialization, otherwise bus errors are obtained.
+ */
+ if (clk_rst_ctl.s.hrst)
+ goto end_clock;
+ /* 3a */
+ clk_rst_ctl.s.p_por = 1;
+ clk_rst_ctl.s.hrst = 0;
+ clk_rst_ctl.s.p_prst = 0;
+ clk_rst_ctl.s.h_clkdiv_rst = 0;
+ clk_rst_ctl.s.o_clkdiv_rst = 0;
+ clk_rst_ctl.s.h_clkdiv_en = 0;
+ clk_rst_ctl.s.o_clkdiv_en = 0;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* 3b */
+ /* 12MHz crystal. */
+ clk_rst_ctl.s.p_refclk_sel = 0;
+ clk_rst_ctl.s.p_refclk_div = 0;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* 3c */
+ div = octeon_get_io_clock_rate() / 130000000ull;
+
+ switch (div) {
+ case 0:
+ div = 1;
+ break;
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ break;
+ case 5:
+ div = 4;
+ break;
+ case 6:
+ case 7:
+ div = 6;
+ break;
+ case 8:
+ case 9:
+ case 10:
+ case 11:
+ div = 8;
+ break;
+ default:
+ div = 12;
+ break;
+ }
+ clk_rst_ctl.s.h_div = div;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+ /* Read it back, */
+ clk_rst_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_CLK_RST_CTL(0));
+ clk_rst_ctl.s.h_clkdiv_en = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+ /* 3d */
+ clk_rst_ctl.s.h_clkdiv_rst = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* 3e: delay 64 io clocks */
+ ndelay(io_clk_64_to_ns);
+
+ /*
+ * Step 4: Program the power-on reset field in the UCTL
+ * clock-reset-control register.
+ */
+ clk_rst_ctl.s.p_por = 0;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* Step 5: Wait 1 ms for the PHY clock to start. */
+ mdelay(1);
+
+ /*
+ * Step 6: Program the reset input from automatic test
+ * equipment field in the UPHY CSR
+ */
+ uphy_ctl_status.u64 = cvmx_read_csr(CVMX_UCTLX_UPHY_CTL_STATUS(0));
+ uphy_ctl_status.s.ate_reset = 1;
+ cvmx_write_csr(CVMX_UCTLX_UPHY_CTL_STATUS(0), uphy_ctl_status.u64);
+
+ /* Step 7: Wait for at least 10ns. */
+ ndelay(10);
+
+ /* Step 8: Clear the ATE_RESET field in the UPHY CSR. */
+ uphy_ctl_status.s.ate_reset = 0;
+ cvmx_write_csr(CVMX_UCTLX_UPHY_CTL_STATUS(0), uphy_ctl_status.u64);
+
+ /*
+ * Step 9: Wait for at least 20ns for UPHY to output PHY clock
+ * signals and OHCI_CLK48
+ */
+ ndelay(20);
+
+ /* Step 10: Configure the OHCI_CLK48 and OHCI_CLK12 clocks. */
+ /* 10a */
+ clk_rst_ctl.s.o_clkdiv_rst = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* 10b */
+ clk_rst_ctl.s.o_clkdiv_en = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* 10c */
+ ndelay(io_clk_64_to_ns);
+
+ /*
+ * Step 11: Program the PHY reset field:
+ * UCTL0_CLK_RST_CTL[P_PRST] = 1
+ */
+ clk_rst_ctl.s.p_prst = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* Step 12: Wait 1 uS. */
+ udelay(1);
+
+ /* Step 13: Program the HRESET_N field: UCTL0_CLK_RST_CTL[HRST] = 1 */
+ clk_rst_ctl.s.hrst = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+end_clock:
+ /* Now we can set some other registers. */
+
+ for (i = 0; i <= 1; i++) {
+ port_ctl_status.u64 =
+ cvmx_read_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0));
+ /* Set txvreftune to 15 to obtain compliant 'eye' diagram. */
+ port_ctl_status.s.txvreftune = 15;
+ port_ctl_status.s.txrisetune = 1;
+ port_ctl_status.s.txpreemphasistune = 1;
+ cvmx_write_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0),
+ port_ctl_status.u64);
+ }
+
+ /* Set uSOF cycle period to 60,000 bits. */
+ cvmx_write_csr(CVMX_UCTLX_EHCI_FLA(0), 0x20ull);
+exit:
+ mutex_unlock(&octeon2_usb_clocks_mutex);
+}
+
+static void octeon2_usb_clocks_stop(void)
+{
+ mutex_lock(&octeon2_usb_clocks_mutex);
+ octeon2_usb_clock_start_cnt--;
+ mutex_unlock(&octeon2_usb_clocks_mutex);
+}
+
+static int octeon_ehci_power_on(struct platform_device *pdev)
+{
+ octeon2_usb_clocks_start();
+ return 0;
+}
+
+static void octeon_ehci_power_off(struct platform_device *pdev)
+{
+ octeon2_usb_clocks_stop();
+}
+
+static struct usb_ehci_pdata octeon_ehci_pdata = {
+ /* Octeon EHCI matches CPU endianness. */
+#ifdef __BIG_ENDIAN
+ .big_endian_mmio = 1,
+#endif
+ .power_on = octeon_ehci_power_on,
+ .power_off = octeon_ehci_power_off,
+};
+
+static void __init octeon_ehci_hw_start(void)
+{
+ union cvmx_uctlx_ehci_ctl ehci_ctl;
+
+ octeon2_usb_clocks_start();
+
+ ehci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_EHCI_CTL(0));
+ /* Use 64-bit addressing. */
+ ehci_ctl.s.ehci_64b_addr_en = 1;
+ ehci_ctl.s.l2c_addr_msb = 0;
+ ehci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */
+ ehci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */
+ cvmx_write_csr(CVMX_UCTLX_EHCI_CTL(0), ehci_ctl.u64);
+
+ octeon2_usb_clocks_stop();
+}
+
+static u64 octeon_ehci_dma_mask = DMA_BIT_MASK(64);
+
static int __init octeon_ehci_device_init(void)
{
struct platform_device *pd;
if (octeon_is_simulation() || usb_disabled())
return 0; /* No USB in the simulator. */
- pd = platform_device_alloc("octeon-ehci", 0);
+ pd = platform_device_alloc("ehci-platform", 0);
if (!pd) {
ret = -ENOMEM;
goto out;
if (ret)
goto fail;
+ pd->dev.dma_mask = &octeon_ehci_dma_mask;
+ pd->dev.platform_data = &octeon_ehci_pdata;
+ octeon_ehci_hw_start();
+
ret = platform_device_add(pd);
if (ret)
goto fail;
}
device_initcall(octeon_ehci_device_init);
+static int octeon_ohci_power_on(struct platform_device *pdev)
+{
+ octeon2_usb_clocks_start();
+ return 0;
+}
+
+static void octeon_ohci_power_off(struct platform_device *pdev)
+{
+ octeon2_usb_clocks_stop();
+}
+
+static struct usb_ohci_pdata octeon_ohci_pdata = {
+ /* Octeon OHCI matches CPU endianness. */
+#ifdef __BIG_ENDIAN
+ .big_endian_mmio = 1,
+#endif
+ .power_on = octeon_ohci_power_on,
+ .power_off = octeon_ohci_power_off,
+};
+
+static void __init octeon_ohci_hw_start(void)
+{
+ union cvmx_uctlx_ohci_ctl ohci_ctl;
+
+ octeon2_usb_clocks_start();
+
+ ohci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_OHCI_CTL(0));
+ ohci_ctl.s.l2c_addr_msb = 0;
+ ohci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */
+ ohci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */
+ cvmx_write_csr(CVMX_UCTLX_OHCI_CTL(0), ohci_ctl.u64);
+
+ octeon2_usb_clocks_stop();
+}
+
static int __init octeon_ohci_device_init(void)
{
struct platform_device *pd;
if (octeon_is_simulation() || usb_disabled())
return 0; /* No USB in the simulator. */
- pd = platform_device_alloc("octeon-ohci", 0);
+ pd = platform_device_alloc("ohci-platform", 0);
if (!pd) {
ret = -ENOMEM;
goto out;
if (ret)
goto fail;
+ pd->dev.platform_data = &octeon_ohci_pdata;
+ octeon_ohci_hw_start();
+
ret = platform_device_add(pd);
if (ret)
goto fail;
projects / cascardo / linux.git / blobdiff