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linux/arch/mips/powertv/powertv-usb.c
David VomLehn 0d365753d0 MIPS: PowerTV: Separate PowerTV USB support from non-USB code 
Separate USB code into a file separate from asic/asic_devices.

Separating the USB code from everything else in asic/asic_devices.c goes
a long way toward reducing the use of that file as a dumping ground for
everything that didn't seem to fit anywhere else.

Signed-off-by: David VomLehn <dvomlehn@cisco.com>
To: linux-mips@linux-mips.org
Cc: greg@kroah.com
Cc: linux-usb@vger.kernel.org
Patchwork: http://patchwork.linux-mips.org/patch/1522/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-08-05 13:26:34 +01:00

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/*
* 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;
}
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