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![Evan Wang](/assets/img/avatar_default.png)
Marvell armada37xx, armada7k and armada8k share the same AHCI sata controller IP, and currently there is an issue (Errata Ref#226)that the SATA can not be detected via SATA Port-MultiPlayer(PMP). After debugging, the reason is found that the value of Port-x FIS-based Switching Control (PxFBS@0x40) became wrong. According to design, the bits[11:8, 0] of register PxFBS are cleared when Port Command and Status (0x18) bit[0] changes its value from 1 to 0, i.e. falling edge of Port Command and Status bit[0] sends PULSE that resets PxFBS bits[11:8; 0]. So it needs save the port PxFBS register before PxCMD ST write and restore the port PxFBS register afterwards in ahci_stop_engine(). This commit allows drivers to override ahci_stop_engine behavior for use by the Marvell AHCI driver(and potentially other drivers in the future). Signed-off-by: Evan Wang <xswang@marvell.com> Cc: Ofer Heifetz <oferh@marvell.com> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Tejun Heo <tj@kernel.org>
649 lines
18 KiB
C
649 lines
18 KiB
C
/*
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* Calxeda Highbank AHCI SATA platform driver
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* Copyright 2012 Calxeda, Inc.
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*
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* based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/kernel.h>
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#include <linux/gfp.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/spinlock.h>
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#include <linux/device.h>
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#include <linux/of_device.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/libata.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/export.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include "ahci.h"
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#define CPHY_MAP(dev, addr) ((((dev) & 0x1f) << 7) | (((addr) >> 9) & 0x7f))
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#define CPHY_ADDR(addr) (((addr) & 0x1ff) << 2)
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#define SERDES_CR_CTL 0x80a0
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#define SERDES_CR_ADDR 0x80a1
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#define SERDES_CR_DATA 0x80a2
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#define CR_BUSY 0x0001
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#define CR_START 0x0001
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#define CR_WR_RDN 0x0002
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#define CPHY_TX_INPUT_STS 0x2001
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#define CPHY_RX_INPUT_STS 0x2002
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#define CPHY_SATA_TX_OVERRIDE 0x8000
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#define CPHY_SATA_RX_OVERRIDE 0x4000
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#define CPHY_TX_OVERRIDE 0x2004
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#define CPHY_RX_OVERRIDE 0x2005
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#define SPHY_LANE 0x100
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#define SPHY_HALF_RATE 0x0001
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#define CPHY_SATA_DPLL_MODE 0x0700
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#define CPHY_SATA_DPLL_SHIFT 8
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#define CPHY_SATA_DPLL_RESET (1 << 11)
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#define CPHY_SATA_TX_ATTEN 0x1c00
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#define CPHY_SATA_TX_ATTEN_SHIFT 10
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#define CPHY_PHY_COUNT 6
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#define CPHY_LANE_COUNT 4
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#define CPHY_PORT_COUNT (CPHY_PHY_COUNT * CPHY_LANE_COUNT)
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static DEFINE_SPINLOCK(cphy_lock);
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/* Each of the 6 phys can have up to 4 sata ports attached to i. Map 0-based
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* sata ports to their phys and then to their lanes within the phys
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*/
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struct phy_lane_info {
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void __iomem *phy_base;
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u8 lane_mapping;
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u8 phy_devs;
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u8 tx_atten;
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};
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static struct phy_lane_info port_data[CPHY_PORT_COUNT];
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static DEFINE_SPINLOCK(sgpio_lock);
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#define SCLOCK 0
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#define SLOAD 1
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#define SDATA 2
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#define SGPIO_PINS 3
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#define SGPIO_PORTS 8
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struct ecx_plat_data {
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u32 n_ports;
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/* number of extra clocks that the SGPIO PIC controller expects */
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u32 pre_clocks;
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u32 post_clocks;
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unsigned sgpio_gpio[SGPIO_PINS];
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u32 sgpio_pattern;
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u32 port_to_sgpio[SGPIO_PORTS];
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};
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#define SGPIO_SIGNALS 3
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#define ECX_ACTIVITY_BITS 0x300000
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#define ECX_ACTIVITY_SHIFT 0
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#define ECX_LOCATE_BITS 0x80000
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#define ECX_LOCATE_SHIFT 1
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#define ECX_FAULT_BITS 0x400000
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#define ECX_FAULT_SHIFT 2
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static inline int sgpio_bit_shift(struct ecx_plat_data *pdata, u32 port,
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u32 shift)
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{
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return 1 << (3 * pdata->port_to_sgpio[port] + shift);
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}
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static void ecx_parse_sgpio(struct ecx_plat_data *pdata, u32 port, u32 state)
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{
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if (state & ECX_ACTIVITY_BITS)
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pdata->sgpio_pattern |= sgpio_bit_shift(pdata, port,
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ECX_ACTIVITY_SHIFT);
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else
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pdata->sgpio_pattern &= ~sgpio_bit_shift(pdata, port,
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ECX_ACTIVITY_SHIFT);
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if (state & ECX_LOCATE_BITS)
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pdata->sgpio_pattern |= sgpio_bit_shift(pdata, port,
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ECX_LOCATE_SHIFT);
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else
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pdata->sgpio_pattern &= ~sgpio_bit_shift(pdata, port,
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ECX_LOCATE_SHIFT);
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if (state & ECX_FAULT_BITS)
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pdata->sgpio_pattern |= sgpio_bit_shift(pdata, port,
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ECX_FAULT_SHIFT);
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else
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pdata->sgpio_pattern &= ~sgpio_bit_shift(pdata, port,
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ECX_FAULT_SHIFT);
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}
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/*
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* Tell the LED controller that the signal has changed by raising the clock
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* line for 50 uS and then lowering it for 50 uS.
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*/
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static void ecx_led_cycle_clock(struct ecx_plat_data *pdata)
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{
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gpio_set_value(pdata->sgpio_gpio[SCLOCK], 1);
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udelay(50);
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gpio_set_value(pdata->sgpio_gpio[SCLOCK], 0);
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udelay(50);
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}
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static ssize_t ecx_transmit_led_message(struct ata_port *ap, u32 state,
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ssize_t size)
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{
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struct ahci_host_priv *hpriv = ap->host->private_data;
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struct ecx_plat_data *pdata = hpriv->plat_data;
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struct ahci_port_priv *pp = ap->private_data;
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unsigned long flags;
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int pmp, i;
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struct ahci_em_priv *emp;
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u32 sgpio_out;
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/* get the slot number from the message */
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pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
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if (pmp < EM_MAX_SLOTS)
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emp = &pp->em_priv[pmp];
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else
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return -EINVAL;
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if (!(hpriv->em_msg_type & EM_MSG_TYPE_LED))
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return size;
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spin_lock_irqsave(&sgpio_lock, flags);
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ecx_parse_sgpio(pdata, ap->port_no, state);
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sgpio_out = pdata->sgpio_pattern;
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for (i = 0; i < pdata->pre_clocks; i++)
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ecx_led_cycle_clock(pdata);
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gpio_set_value(pdata->sgpio_gpio[SLOAD], 1);
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ecx_led_cycle_clock(pdata);
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gpio_set_value(pdata->sgpio_gpio[SLOAD], 0);
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/*
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* bit-bang out the SGPIO pattern, by consuming a bit and then
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* clocking it out.
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*/
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for (i = 0; i < (SGPIO_SIGNALS * pdata->n_ports); i++) {
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gpio_set_value(pdata->sgpio_gpio[SDATA], sgpio_out & 1);
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sgpio_out >>= 1;
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ecx_led_cycle_clock(pdata);
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}
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for (i = 0; i < pdata->post_clocks; i++)
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ecx_led_cycle_clock(pdata);
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/* save off new led state for port/slot */
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emp->led_state = state;
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spin_unlock_irqrestore(&sgpio_lock, flags);
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return size;
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}
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static void highbank_set_em_messages(struct device *dev,
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struct ahci_host_priv *hpriv,
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struct ata_port_info *pi)
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{
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struct device_node *np = dev->of_node;
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struct ecx_plat_data *pdata = hpriv->plat_data;
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int i;
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int err;
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for (i = 0; i < SGPIO_PINS; i++) {
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err = of_get_named_gpio(np, "calxeda,sgpio-gpio", i);
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if (err < 0)
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return;
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pdata->sgpio_gpio[i] = err;
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err = gpio_request(pdata->sgpio_gpio[i], "CX SGPIO");
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if (err) {
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pr_err("sata_highbank gpio_request %d failed: %d\n",
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i, err);
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return;
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}
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gpio_direction_output(pdata->sgpio_gpio[i], 1);
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}
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of_property_read_u32_array(np, "calxeda,led-order",
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pdata->port_to_sgpio,
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pdata->n_ports);
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if (of_property_read_u32(np, "calxeda,pre-clocks", &pdata->pre_clocks))
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pdata->pre_clocks = 0;
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if (of_property_read_u32(np, "calxeda,post-clocks",
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&pdata->post_clocks))
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pdata->post_clocks = 0;
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/* store em_loc */
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hpriv->em_loc = 0;
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hpriv->em_buf_sz = 4;
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hpriv->em_msg_type = EM_MSG_TYPE_LED;
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pi->flags |= ATA_FLAG_EM | ATA_FLAG_SW_ACTIVITY;
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}
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static u32 __combo_phy_reg_read(u8 sata_port, u32 addr)
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{
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u32 data;
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u8 dev = port_data[sata_port].phy_devs;
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spin_lock(&cphy_lock);
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writel(CPHY_MAP(dev, addr), port_data[sata_port].phy_base + 0x800);
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data = readl(port_data[sata_port].phy_base + CPHY_ADDR(addr));
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spin_unlock(&cphy_lock);
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return data;
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}
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static void __combo_phy_reg_write(u8 sata_port, u32 addr, u32 data)
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{
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u8 dev = port_data[sata_port].phy_devs;
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spin_lock(&cphy_lock);
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writel(CPHY_MAP(dev, addr), port_data[sata_port].phy_base + 0x800);
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writel(data, port_data[sata_port].phy_base + CPHY_ADDR(addr));
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spin_unlock(&cphy_lock);
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}
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static void combo_phy_wait_for_ready(u8 sata_port)
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{
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while (__combo_phy_reg_read(sata_port, SERDES_CR_CTL) & CR_BUSY)
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udelay(5);
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}
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static u32 combo_phy_read(u8 sata_port, u32 addr)
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{
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combo_phy_wait_for_ready(sata_port);
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__combo_phy_reg_write(sata_port, SERDES_CR_ADDR, addr);
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__combo_phy_reg_write(sata_port, SERDES_CR_CTL, CR_START);
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combo_phy_wait_for_ready(sata_port);
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return __combo_phy_reg_read(sata_port, SERDES_CR_DATA);
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}
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static void combo_phy_write(u8 sata_port, u32 addr, u32 data)
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{
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combo_phy_wait_for_ready(sata_port);
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__combo_phy_reg_write(sata_port, SERDES_CR_ADDR, addr);
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__combo_phy_reg_write(sata_port, SERDES_CR_DATA, data);
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__combo_phy_reg_write(sata_port, SERDES_CR_CTL, CR_WR_RDN | CR_START);
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}
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static void highbank_cphy_disable_overrides(u8 sata_port)
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{
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u8 lane = port_data[sata_port].lane_mapping;
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u32 tmp;
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if (unlikely(port_data[sata_port].phy_base == NULL))
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return;
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tmp = combo_phy_read(sata_port, CPHY_RX_INPUT_STS + lane * SPHY_LANE);
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tmp &= ~CPHY_SATA_RX_OVERRIDE;
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combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
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}
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static void cphy_override_tx_attenuation(u8 sata_port, u32 val)
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{
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u8 lane = port_data[sata_port].lane_mapping;
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u32 tmp;
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if (val & 0x8)
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return;
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tmp = combo_phy_read(sata_port, CPHY_TX_INPUT_STS + lane * SPHY_LANE);
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tmp &= ~CPHY_SATA_TX_OVERRIDE;
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combo_phy_write(sata_port, CPHY_TX_OVERRIDE + lane * SPHY_LANE, tmp);
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tmp |= CPHY_SATA_TX_OVERRIDE;
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combo_phy_write(sata_port, CPHY_TX_OVERRIDE + lane * SPHY_LANE, tmp);
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tmp |= (val << CPHY_SATA_TX_ATTEN_SHIFT) & CPHY_SATA_TX_ATTEN;
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combo_phy_write(sata_port, CPHY_TX_OVERRIDE + lane * SPHY_LANE, tmp);
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}
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static void cphy_override_rx_mode(u8 sata_port, u32 val)
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{
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u8 lane = port_data[sata_port].lane_mapping;
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u32 tmp;
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tmp = combo_phy_read(sata_port, CPHY_RX_INPUT_STS + lane * SPHY_LANE);
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tmp &= ~CPHY_SATA_RX_OVERRIDE;
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combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
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tmp |= CPHY_SATA_RX_OVERRIDE;
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combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
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tmp &= ~CPHY_SATA_DPLL_MODE;
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tmp |= val << CPHY_SATA_DPLL_SHIFT;
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combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
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tmp |= CPHY_SATA_DPLL_RESET;
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combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
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tmp &= ~CPHY_SATA_DPLL_RESET;
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combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
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msleep(15);
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}
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static void highbank_cphy_override_lane(u8 sata_port)
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{
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u8 lane = port_data[sata_port].lane_mapping;
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u32 tmp, k = 0;
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if (unlikely(port_data[sata_port].phy_base == NULL))
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return;
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do {
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tmp = combo_phy_read(sata_port, CPHY_RX_INPUT_STS +
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lane * SPHY_LANE);
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} while ((tmp & SPHY_HALF_RATE) && (k++ < 1000));
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cphy_override_rx_mode(sata_port, 3);
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cphy_override_tx_attenuation(sata_port, port_data[sata_port].tx_atten);
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}
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static int highbank_initialize_phys(struct device *dev, void __iomem *addr)
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{
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struct device_node *sata_node = dev->of_node;
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int phy_count = 0, phy, port = 0, i;
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void __iomem *cphy_base[CPHY_PHY_COUNT] = {};
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struct device_node *phy_nodes[CPHY_PHY_COUNT] = {};
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u32 tx_atten[CPHY_PORT_COUNT] = {};
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memset(port_data, 0, sizeof(struct phy_lane_info) * CPHY_PORT_COUNT);
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do {
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u32 tmp;
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struct of_phandle_args phy_data;
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if (of_parse_phandle_with_args(sata_node,
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"calxeda,port-phys", "#phy-cells",
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port, &phy_data))
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break;
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for (phy = 0; phy < phy_count; phy++) {
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if (phy_nodes[phy] == phy_data.np)
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break;
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}
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if (phy_nodes[phy] == NULL) {
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phy_nodes[phy] = phy_data.np;
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cphy_base[phy] = of_iomap(phy_nodes[phy], 0);
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if (cphy_base[phy] == NULL) {
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return 0;
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}
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phy_count += 1;
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}
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port_data[port].lane_mapping = phy_data.args[0];
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of_property_read_u32(phy_nodes[phy], "phydev", &tmp);
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port_data[port].phy_devs = tmp;
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port_data[port].phy_base = cphy_base[phy];
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of_node_put(phy_data.np);
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port += 1;
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} while (port < CPHY_PORT_COUNT);
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of_property_read_u32_array(sata_node, "calxeda,tx-atten",
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tx_atten, port);
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for (i = 0; i < port; i++)
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port_data[i].tx_atten = (u8) tx_atten[i];
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return 0;
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}
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/*
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* The Calxeda SATA phy intermittently fails to bring up a link with Gen3
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* Retrying the phy hard reset can work around the issue, but the drive
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* may fail again. In less than 150 out of 15000 test runs, it took more
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* than 10 tries for the link to be established (but never more than 35).
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* Triple the maximum observed retry count to provide plenty of margin for
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* rare events and to guarantee that the link is established.
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*
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* Also, the default 2 second time-out on a failed drive is too long in
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* this situation. The uboot implementation of the same driver function
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* uses a much shorter time-out period and never experiences a time out
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* issue. Reducing the time-out to 500ms improves the responsiveness.
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* The other timing constants were kept the same as the stock AHCI driver.
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* This change was also tested 15000 times on 24 drives and none of them
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* experienced a time out.
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*/
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static int ahci_highbank_hardreset(struct ata_link *link, unsigned int *class,
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unsigned long deadline)
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{
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static const unsigned long timing[] = { 5, 100, 500};
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struct ata_port *ap = link->ap;
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struct ahci_port_priv *pp = ap->private_data;
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struct ahci_host_priv *hpriv = ap->host->private_data;
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u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
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struct ata_taskfile tf;
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bool online;
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u32 sstatus;
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int rc;
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int retry = 100;
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hpriv->stop_engine(ap);
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/* clear D2H reception area to properly wait for D2H FIS */
|
|
ata_tf_init(link->device, &tf);
|
|
tf.command = ATA_BUSY;
|
|
ata_tf_to_fis(&tf, 0, 0, d2h_fis);
|
|
|
|
do {
|
|
highbank_cphy_disable_overrides(link->ap->port_no);
|
|
rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
|
|
highbank_cphy_override_lane(link->ap->port_no);
|
|
|
|
/* If the status is 1, we are connected, but the link did not
|
|
* come up. So retry resetting the link again.
|
|
*/
|
|
if (sata_scr_read(link, SCR_STATUS, &sstatus))
|
|
break;
|
|
if (!(sstatus & 0x3))
|
|
break;
|
|
} while (!online && retry--);
|
|
|
|
hpriv->start_engine(ap);
|
|
|
|
if (online)
|
|
*class = ahci_dev_classify(ap);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static struct ata_port_operations ahci_highbank_ops = {
|
|
.inherits = &ahci_ops,
|
|
.hardreset = ahci_highbank_hardreset,
|
|
.transmit_led_message = ecx_transmit_led_message,
|
|
};
|
|
|
|
static const struct ata_port_info ahci_highbank_port_info = {
|
|
.flags = AHCI_FLAG_COMMON,
|
|
.pio_mask = ATA_PIO4,
|
|
.udma_mask = ATA_UDMA6,
|
|
.port_ops = &ahci_highbank_ops,
|
|
};
|
|
|
|
static struct scsi_host_template ahci_highbank_platform_sht = {
|
|
AHCI_SHT("sata_highbank"),
|
|
};
|
|
|
|
static const struct of_device_id ahci_of_match[] = {
|
|
{ .compatible = "calxeda,hb-ahci" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ahci_of_match);
|
|
|
|
static int ahci_highbank_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct ahci_host_priv *hpriv;
|
|
struct ecx_plat_data *pdata;
|
|
struct ata_host *host;
|
|
struct resource *mem;
|
|
int irq;
|
|
int i;
|
|
int rc;
|
|
u32 n_ports;
|
|
struct ata_port_info pi = ahci_highbank_port_info;
|
|
const struct ata_port_info *ppi[] = { &pi, NULL };
|
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!mem) {
|
|
dev_err(dev, "no mmio space\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq <= 0) {
|
|
dev_err(dev, "no irq\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
|
|
if (!hpriv) {
|
|
dev_err(dev, "can't alloc ahci_host_priv\n");
|
|
return -ENOMEM;
|
|
}
|
|
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata) {
|
|
dev_err(dev, "can't alloc ecx_plat_data\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
hpriv->irq = irq;
|
|
hpriv->flags |= (unsigned long)pi.private_data;
|
|
|
|
hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem));
|
|
if (!hpriv->mmio) {
|
|
dev_err(dev, "can't map %pR\n", mem);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rc = highbank_initialize_phys(dev, hpriv->mmio);
|
|
if (rc)
|
|
return rc;
|
|
|
|
|
|
ahci_save_initial_config(dev, hpriv);
|
|
|
|
/* prepare host */
|
|
if (hpriv->cap & HOST_CAP_NCQ)
|
|
pi.flags |= ATA_FLAG_NCQ;
|
|
|
|
if (hpriv->cap & HOST_CAP_PMP)
|
|
pi.flags |= ATA_FLAG_PMP;
|
|
|
|
if (hpriv->cap & HOST_CAP_64)
|
|
dma_set_coherent_mask(dev, DMA_BIT_MASK(64));
|
|
|
|
/* CAP.NP sometimes indicate the index of the last enabled
|
|
* port, at other times, that of the last possible port, so
|
|
* determining the maximum port number requires looking at
|
|
* both CAP.NP and port_map.
|
|
*/
|
|
n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
|
|
|
|
pdata->n_ports = n_ports;
|
|
hpriv->plat_data = pdata;
|
|
highbank_set_em_messages(dev, hpriv, &pi);
|
|
|
|
host = ata_host_alloc_pinfo(dev, ppi, n_ports);
|
|
if (!host) {
|
|
rc = -ENOMEM;
|
|
goto err0;
|
|
}
|
|
|
|
host->private_data = hpriv;
|
|
|
|
if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
|
|
host->flags |= ATA_HOST_PARALLEL_SCAN;
|
|
|
|
for (i = 0; i < host->n_ports; i++) {
|
|
struct ata_port *ap = host->ports[i];
|
|
|
|
ata_port_desc(ap, "mmio %pR", mem);
|
|
ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
|
|
|
|
/* set enclosure management message type */
|
|
if (ap->flags & ATA_FLAG_EM)
|
|
ap->em_message_type = hpriv->em_msg_type;
|
|
|
|
/* disabled/not-implemented port */
|
|
if (!(hpriv->port_map & (1 << i)))
|
|
ap->ops = &ata_dummy_port_ops;
|
|
}
|
|
|
|
rc = ahci_reset_controller(host);
|
|
if (rc)
|
|
goto err0;
|
|
|
|
ahci_init_controller(host);
|
|
ahci_print_info(host, "platform");
|
|
|
|
rc = ahci_host_activate(host, &ahci_highbank_platform_sht);
|
|
if (rc)
|
|
goto err0;
|
|
|
|
return 0;
|
|
err0:
|
|
return rc;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int ahci_highbank_suspend(struct device *dev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(dev);
|
|
struct ahci_host_priv *hpriv = host->private_data;
|
|
void __iomem *mmio = hpriv->mmio;
|
|
u32 ctl;
|
|
int rc;
|
|
|
|
if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
|
|
dev_err(dev, "firmware update required for suspend/resume\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* AHCI spec rev1.1 section 8.3.3:
|
|
* Software must disable interrupts prior to requesting a
|
|
* transition of the HBA to D3 state.
|
|
*/
|
|
ctl = readl(mmio + HOST_CTL);
|
|
ctl &= ~HOST_IRQ_EN;
|
|
writel(ctl, mmio + HOST_CTL);
|
|
readl(mmio + HOST_CTL); /* flush */
|
|
|
|
rc = ata_host_suspend(host, PMSG_SUSPEND);
|
|
if (rc)
|
|
return rc;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ahci_highbank_resume(struct device *dev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(dev);
|
|
int rc;
|
|
|
|
if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
|
|
rc = ahci_reset_controller(host);
|
|
if (rc)
|
|
return rc;
|
|
|
|
ahci_init_controller(host);
|
|
}
|
|
|
|
ata_host_resume(host);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(ahci_highbank_pm_ops,
|
|
ahci_highbank_suspend, ahci_highbank_resume);
|
|
|
|
static struct platform_driver ahci_highbank_driver = {
|
|
.remove = ata_platform_remove_one,
|
|
.driver = {
|
|
.name = "highbank-ahci",
|
|
.of_match_table = ahci_of_match,
|
|
.pm = &ahci_highbank_pm_ops,
|
|
},
|
|
.probe = ahci_highbank_probe,
|
|
};
|
|
|
|
module_platform_driver(ahci_highbank_driver);
|
|
|
|
MODULE_DESCRIPTION("Calxeda Highbank AHCI SATA platform driver");
|
|
MODULE_AUTHOR("Mark Langsdorf <mark.langsdorf@calxeda.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("sata:highbank");
|