diff options
Diffstat (limited to 'arch/mips/powertv/powertv-usb.c')
| -rw-r--r-- | arch/mips/powertv/powertv-usb.c | 403 |
1 files changed, 403 insertions, 0 deletions
diff --git a/arch/mips/powertv/powertv-usb.c b/arch/mips/powertv/powertv-usb.c new file mode 100644 index 00000000000..6ac85cf7aa2 --- /dev/null +++ b/arch/mips/powertv/powertv-usb.c @@ -0,0 +1,403 @@ +/* + * powertv-usb.c + * + * Description: ASIC-specific USB device setup and shutdown + * + * Copyright (C) 2005-2009 Scientific-Atlanta, Inc. + * Copyright (C) 2009 Cisco Systems, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + * Author: Ken Eppinett + * David Schleef <ds@schleef.org> + * + * NOTE: The bootloader allocates persistent memory at an address which is + * 16 MiB below the end of the highest address in KSEG0. All fixed + * address memory reservations must avoid this region. + */ + +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/platform_device.h> +#include <asm/mach-powertv/asic.h> +#include <asm/mach-powertv/interrupts.h> + +/* misc_clk_ctl1 values */ +#define MCC1_30MHZ_POWERUP_SELECT (1 << 14) +#define MCC1_DIV9 (1 << 13) +#define MCC1_ETHMIPS_POWERUP_SELECT (1 << 11) +#define MCC1_USB_POWERUP_SELECT (1 << 1) +#define MCC1_CLOCK108_POWERUP_SELECT (1 << 0) + +/* Possible values for clock select */ +#define MCC1_USB_CLOCK_HIGH_Z (0 << 4) +#define MCC1_USB_CLOCK_48MHZ (1 << 4) +#define MCC1_USB_CLOCK_24MHZ (2 << 4) +#define MCC1_USB_CLOCK_6MHZ (3 << 4) + +#define MCC1_CONFIG (MCC1_30MHZ_POWERUP_SELECT | \ + MCC1_DIV9 | \ + MCC1_ETHMIPS_POWERUP_SELECT | \ + MCC1_USB_POWERUP_SELECT | \ + MCC1_CLOCK108_POWERUP_SELECT) + +/* misc_clk_ctl2 values */ +#define MCC2_GMII_GCLK_TO_PAD (1 << 31) +#define MCC2_ETHER125_0_CLOCK_SELECT (1 << 29) +#define MCC2_RMII_0_CLOCK_SELECT (1 << 28) +#define MCC2_GMII_TX0_CLOCK_SELECT (1 << 27) +#define MCC2_GMII_RX0_CLOCK_SELECT (1 << 26) +#define MCC2_ETHER125_1_CLOCK_SELECT (1 << 24) +#define MCC2_RMII_1_CLOCK_SELECT (1 << 23) +#define MCC2_GMII_TX1_CLOCK_SELECT (1 << 22) +#define MCC2_GMII_RX1_CLOCK_SELECT (1 << 21) +#define MCC2_ETHER125_2_CLOCK_SELECT (1 << 19) +#define MCC2_RMII_2_CLOCK_SELECT (1 << 18) +#define MCC2_GMII_TX2_CLOCK_SELECT (1 << 17) +#define MCC2_GMII_RX2_CLOCK_SELECT (1 << 16) + +#define ETHER_CLK_CONFIG (MCC2_GMII_GCLK_TO_PAD | \ + MCC2_ETHER125_0_CLOCK_SELECT | \ + MCC2_RMII_0_CLOCK_SELECT | \ + MCC2_GMII_TX0_CLOCK_SELECT | \ + MCC2_GMII_RX0_CLOCK_SELECT | \ + MCC2_ETHER125_1_CLOCK_SELECT | \ + MCC2_RMII_1_CLOCK_SELECT | \ + MCC2_GMII_TX1_CLOCK_SELECT | \ + MCC2_GMII_RX1_CLOCK_SELECT | \ + MCC2_ETHER125_2_CLOCK_SELECT | \ + MCC2_RMII_2_CLOCK_SELECT | \ + MCC2_GMII_TX2_CLOCK_SELECT | \ + MCC2_GMII_RX2_CLOCK_SELECT) + +/* misc_clk_ctl2 definitions for Gaia */ +#define FSX4A_REF_SELECT (1 << 16) +#define FSX4B_REF_SELECT (1 << 17) +#define FSX4C_REF_SELECT (1 << 18) +#define DDR_PLL_REF_SELECT (1 << 19) +#define MIPS_PLL_REF_SELECT (1 << 20) + +/* Definitions for the QAM frequency select register FS432X4A4_QAM_CTL */ +#define QAM_FS_SDIV_SHIFT 29 +#define QAM_FS_MD_SHIFT 24 +#define QAM_FS_MD_MASK 0x1f /* Cut down to 5 bits */ +#define QAM_FS_PE_SHIFT 8 + +#define QAM_FS_DISABLE_DIVIDE_BY_3 (1 << 5) +#define QAM_FS_ENABLE_PROGRAM (1 << 4) +#define QAM_FS_ENABLE_OUTPUT (1 << 3) +#define QAM_FS_SELECT_TEST_BYPASS (1 << 2) +#define QAM_FS_DISABLE_DIGITAL_STANDBY (1 << 1) +#define QAM_FS_CHOOSE_FS (1 << 0) + +/* Definitions for fs432x4a_ctl register */ +#define QAM_FS_NSDIV_54MHZ (1 << 2) + +/* Definitions for bcm1_usb2_ctl register */ +#define BCM1_USB2_CTL_BISTOK (1 << 11) +#define BCM1_USB2_CTL_PORT2_SHIFT_JK (1 << 7) +#define BCM1_USB2_CTL_PORT1_SHIFT_JK (1 << 6) +#define BCM1_USB2_CTL_PORT2_FAST_EDGE (1 << 5) +#define BCM1_USB2_CTL_PORT1_FAST_EDGE (1 << 4) +#define BCM1_USB2_CTL_EHCI_PRT_PWR_ACTIVE_HIGH (1 << 1) +#define BCM1_USB2_CTL_APP_PRT_OVRCUR_IN_ACTIVE_HIGH (1 << 0) + +/* Definitions for crt_spare register */ +#define CRT_SPARE_PORT2_SHIFT_JK (1 << 21) +#define CRT_SPARE_PORT1_SHIFT_JK (1 << 20) +#define CRT_SPARE_PORT2_FAST_EDGE (1 << 19) +#define CRT_SPARE_PORT1_FAST_EDGE (1 << 18) +#define CRT_SPARE_DIVIDE_BY_9_FROM_432 (1 << 17) +#define CRT_SPARE_USB_DIVIDE_BY_9 (1 << 16) + +/* Definitions for usb2_stbus_obc register */ +#define USB_STBUS_OBC_STORE32_LOAD32 0x3 + +/* Definitions for usb2_stbus_mess_size register */ +#define USB2_STBUS_MESS_SIZE_2 0x1 /* 2 packets */ + +/* Definitions for usb2_stbus_chunk_size register */ +#define USB2_STBUS_CHUNK_SIZE_2 0x1 /* 2 packets */ + +/* Definitions for usb2_strap register */ +#define USB2_STRAP_HFREQ_SELECT 0x1 + +/* + * USB Host Resource Definition + */ + +static struct resource ehci_resources[] = { + { + .parent = &asic_resource, + .start = 0, + .end = 0xff, + .flags = IORESOURCE_MEM, + }, + { + .start = irq_usbehci, + .end = irq_usbehci, + .flags = IORESOURCE_IRQ, + }, +}; + +static u64 ehci_dmamask = 0xffffffffULL; + +static struct platform_device ehci_device = { + .name = "powertv-ehci", + .id = 0, + .num_resources = 2, + .resource = ehci_resources, + .dev = { + .dma_mask = &ehci_dmamask, + .coherent_dma_mask = 0xffffffff, + }, +}; + +static struct resource ohci_resources[] = { + { + .parent = &asic_resource, + .start = 0, + .end = 0xff, + .flags = IORESOURCE_MEM, + }, + { + .start = irq_usbohci, + .end = irq_usbohci, + .flags = IORESOURCE_IRQ, + }, +}; + +static u64 ohci_dmamask = 0xffffffffULL; + +static struct platform_device ohci_device = { + .name = "powertv-ohci", + .id = 0, + .num_resources = 2, + .resource = ohci_resources, + .dev = { + .dma_mask = &ohci_dmamask, + .coherent_dma_mask = 0xffffffff, + }, +}; + +static unsigned usb_users; +static DEFINE_SPINLOCK(usb_regs_lock); + +/* + * + * fs_update - set frequency synthesizer for USB + * @pe_bits Phase tap setting + * @md_bits Coarse selector bus for algorithm of phase tap + * @sdiv_bits Output divider setting + * @disable_div_by_3 Either QAM_FS_DISABLE_DIVIDE_BY_3 or zero + * @standby Either QAM_FS_DISABLE_DIGITAL_STANDBY or zero + * + * QAM frequency selection code, which affects the frequency at which USB + * runs. The frequency is calculated as: + * 2^15 * ndiv * Fin + * Fout = ------------------------------------------------------------ + * (sdiv * (ipe * (1 + md/32) - (ipe - 2^15)*(1 + (md + 1)/32))) + * where: + * Fin 54 MHz + * ndiv QAM_FS_NSDIV_54MHZ ? 8 : 16 + * sdiv 1 << (sdiv_bits + 1) + * ipe Same as pe_bits + * md A five-bit, two's-complement integer (range [-16, 15]), which + * is the lower 5 bits of md_bits. + */ +static void fs_update(u32 pe_bits, int md_bits, u32 sdiv_bits, + u32 disable_div_by_3, u32 standby) +{ + u32 val; + + val = ((sdiv_bits << QAM_FS_SDIV_SHIFT) | + ((md_bits & QAM_FS_MD_MASK) << QAM_FS_MD_SHIFT) | + (pe_bits << QAM_FS_PE_SHIFT) | + QAM_FS_ENABLE_OUTPUT | + standby | + disable_div_by_3); + asic_write(val, fs432x4b4_usb_ctl); + asic_write(val | QAM_FS_ENABLE_PROGRAM, fs432x4b4_usb_ctl); + asic_write(val | QAM_FS_ENABLE_PROGRAM | QAM_FS_CHOOSE_FS, + fs432x4b4_usb_ctl); +} + +/* + * usb_eye_configure - for optimizing the shape USB eye waveform + * @set: Bits to set in the register + * @clear: Bits to clear in the register; each bit with a one will + * be set in the register, zero bits will not be modified + */ +static void usb_eye_configure(u32 set, u32 clear) +{ + u32 old; + + old = asic_read(crt_spare); + old |= set; + old &= ~clear; + asic_write(old, crt_spare); +} + +/* + * platform_configure_usb - usb configuration based on platform type. + */ +static void platform_configure_usb(void) +{ + u32 bcm1_usb2_ctl_value; + enum asic_type asic_type; + unsigned long flags; + + spin_lock_irqsave(&usb_regs_lock, flags); + usb_users++; + + if (usb_users != 1) { + spin_unlock_irqrestore(&usb_regs_lock, flags); + return; + } + + asic_type = platform_get_asic(); + + switch (asic_type) { + case ASIC_ZEUS: + fs_update(0x0000, -15, 0x02, 0, 0); + bcm1_usb2_ctl_value = BCM1_USB2_CTL_EHCI_PRT_PWR_ACTIVE_HIGH | + BCM1_USB2_CTL_APP_PRT_OVRCUR_IN_ACTIVE_HIGH; + break; + + case ASIC_CRONUS: + case ASIC_CRONUSLITE: + usb_eye_configure(0, CRT_SPARE_USB_DIVIDE_BY_9); + fs_update(0x8000, -14, 0x03, QAM_FS_DISABLE_DIVIDE_BY_3, + QAM_FS_DISABLE_DIGITAL_STANDBY); + bcm1_usb2_ctl_value = BCM1_USB2_CTL_EHCI_PRT_PWR_ACTIVE_HIGH | + BCM1_USB2_CTL_APP_PRT_OVRCUR_IN_ACTIVE_HIGH; + break; + + case ASIC_CALLIOPE: + fs_update(0x0000, -15, 0x02, QAM_FS_DISABLE_DIVIDE_BY_3, + QAM_FS_DISABLE_DIGITAL_STANDBY); + + switch (platform_get_family()) { + case FAMILY_1500VZE: + break; + + case FAMILY_1500VZF: + usb_eye_configure(CRT_SPARE_PORT2_SHIFT_JK | + CRT_SPARE_PORT1_SHIFT_JK | + CRT_SPARE_PORT2_FAST_EDGE | + CRT_SPARE_PORT1_FAST_EDGE, 0); + break; + + default: + usb_eye_configure(CRT_SPARE_PORT2_SHIFT_JK | + CRT_SPARE_PORT1_SHIFT_JK, 0); + break; + } + + bcm1_usb2_ctl_value = BCM1_USB2_CTL_BISTOK | + BCM1_USB2_CTL_EHCI_PRT_PWR_ACTIVE_HIGH | + BCM1_USB2_CTL_APP_PRT_OVRCUR_IN_ACTIVE_HIGH; + break; + + case ASIC_GAIA: + fs_update(0x8000, -14, 0x03, QAM_FS_DISABLE_DIVIDE_BY_3, + QAM_FS_DISABLE_DIGITAL_STANDBY); + bcm1_usb2_ctl_value = BCM1_USB2_CTL_BISTOK | + BCM1_USB2_CTL_EHCI_PRT_PWR_ACTIVE_HIGH | + BCM1_USB2_CTL_APP_PRT_OVRCUR_IN_ACTIVE_HIGH; + break; + + default: + pr_err("Unknown ASIC type: %d\n", asic_type); + bcm1_usb2_ctl_value = 0; + break; + } + + /* turn on USB power */ + asic_write(0, usb2_strap); + /* Enable all OHCI interrupts */ + asic_write(bcm1_usb2_ctl_value, usb2_control); + /* usb2_stbus_obc store32/load32 */ + asic_write(USB_STBUS_OBC_STORE32_LOAD32, usb2_stbus_obc); + /* usb2_stbus_mess_size 2 packets */ + asic_write(USB2_STBUS_MESS_SIZE_2, usb2_stbus_mess_size); + /* usb2_stbus_chunk_size 2 packets */ + asic_write(USB2_STBUS_CHUNK_SIZE_2, usb2_stbus_chunk_size); + spin_unlock_irqrestore(&usb_regs_lock, flags); +} + +static void platform_unconfigure_usb(void) +{ + unsigned long flags; + + spin_lock_irqsave(&usb_regs_lock, flags); + usb_users--; + if (usb_users == 0) + asic_write(USB2_STRAP_HFREQ_SELECT, usb2_strap); + spin_unlock_irqrestore(&usb_regs_lock, flags); +} + +/* + * Set up the USB EHCI interface + */ +void platform_configure_usb_ehci() +{ + platform_configure_usb(); +} +EXPORT_SYMBOL(platform_configure_usb_ehci); + +/* + * Set up the USB OHCI interface + */ +void platform_configure_usb_ohci() +{ + platform_configure_usb(); +} +EXPORT_SYMBOL(platform_configure_usb_ohci); + +/* + * Shut the USB EHCI interface down + */ +void platform_unconfigure_usb_ehci() +{ + platform_unconfigure_usb(); +} +EXPORT_SYMBOL(platform_unconfigure_usb_ehci); + +/* + * Shut the USB OHCI interface down + */ +void platform_unconfigure_usb_ohci() +{ + platform_unconfigure_usb(); +} +EXPORT_SYMBOL(platform_unconfigure_usb_ohci); + +/** + * platform_devices_init - sets up USB device resourse. + */ +int __init platform_usb_devices_init(struct platform_device **ehci_dev, + struct platform_device **ohci_dev) +{ + *ehci_dev = &ehci_device; + ehci_resources[0].start = asic_reg_phys_addr(ehci_hcapbase); + ehci_resources[0].end += ehci_resources[0].start; + + *ohci_dev = &ohci_device; + ohci_resources[0].start = asic_reg_phys_addr(ohci_hc_revision); + ohci_resources[0].end += ohci_resources[0].start; + + return 0; +} |