[RFC PATCH 02/11] ata: Remove Calxeda AHCI driver
From: Rob Herring
Date: Tue Feb 18 2020 - 12:13:33 EST
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: linux-ide@xxxxxxxxxxxxxxx
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
---
Do not apply yet.
drivers/ata/Kconfig | 9 -
drivers/ata/Makefile | 1 -
drivers/ata/sata_highbank.c | 635 ------------------------------------
3 files changed, 645 deletions(-)
delete mode 100644 drivers/ata/sata_highbank.c
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index a6beb2c5a692..687ddd9f4188 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -395,15 +395,6 @@ config SATA_DWC_VDEBUG
help
This option enables the taskfile dumping and NCQ debugging.
-config SATA_HIGHBANK
- tristate "Calxeda Highbank SATA support"
- depends on ARCH_HIGHBANK || COMPILE_TEST
- help
- This option enables support for the Calxeda Highbank SoC's
- onboard SATA.
-
- If unsure, say N.
-
config SATA_MV
tristate "Marvell SATA support"
depends on PCI || ARCH_DOVE || ARCH_MV78XX0 || \
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index d8cc2e04a6c7..08f26d674ed7 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -12,7 +12,6 @@ obj-$(CONFIG_SATA_GEMINI) += sata_gemini.o
obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o
obj-$(CONFIG_SATA_SIL24) += sata_sil24.o
obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o
-obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o
obj-$(CONFIG_AHCI_BRCM) += ahci_brcm.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_CEVA) += ahci_ceva.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_DA850) += ahci_da850.o libahci.o libahci_platform.o
diff --git a/drivers/ata/sata_highbank.c b/drivers/ata/sata_highbank.c
deleted file mode 100644
index ad3893c62572..000000000000
--- a/drivers/ata/sata_highbank.c
+++ /dev/null
@@ -1,635 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Calxeda Highbank AHCI SATA platform driver
- * Copyright 2012 Calxeda, Inc.
- *
- * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
- */
-#include <linux/kernel.h>
-#include <linux/gfp.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/spinlock.h>
-#include <linux/device.h>
-#include <linux/of_device.h>
-#include <linux/of_address.h>
-#include <linux/platform_device.h>
-#include <linux/libata.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/export.h>
-#include <linux/gpio/consumer.h>
-
-#include "ahci.h"
-
-#define CPHY_MAP(dev, addr) ((((dev) & 0x1f) << 7) | (((addr) >> 9) & 0x7f))
-#define CPHY_ADDR(addr) (((addr) & 0x1ff) << 2)
-#define SERDES_CR_CTL 0x80a0
-#define SERDES_CR_ADDR 0x80a1
-#define SERDES_CR_DATA 0x80a2
-#define CR_BUSY 0x0001
-#define CR_START 0x0001
-#define CR_WR_RDN 0x0002
-#define CPHY_TX_INPUT_STS 0x2001
-#define CPHY_RX_INPUT_STS 0x2002
-#define CPHY_SATA_TX_OVERRIDE 0x8000
-#define CPHY_SATA_RX_OVERRIDE 0x4000
-#define CPHY_TX_OVERRIDE 0x2004
-#define CPHY_RX_OVERRIDE 0x2005
-#define SPHY_LANE 0x100
-#define SPHY_HALF_RATE 0x0001
-#define CPHY_SATA_DPLL_MODE 0x0700
-#define CPHY_SATA_DPLL_SHIFT 8
-#define CPHY_SATA_DPLL_RESET (1 << 11)
-#define CPHY_SATA_TX_ATTEN 0x1c00
-#define CPHY_SATA_TX_ATTEN_SHIFT 10
-#define CPHY_PHY_COUNT 6
-#define CPHY_LANE_COUNT 4
-#define CPHY_PORT_COUNT (CPHY_PHY_COUNT * CPHY_LANE_COUNT)
-
-static DEFINE_SPINLOCK(cphy_lock);
-/* Each of the 6 phys can have up to 4 sata ports attached to i. Map 0-based
- * sata ports to their phys and then to their lanes within the phys
- */
-struct phy_lane_info {
- void __iomem *phy_base;
- u8 lane_mapping;
- u8 phy_devs;
- u8 tx_atten;
-};
-static struct phy_lane_info port_data[CPHY_PORT_COUNT];
-
-static DEFINE_SPINLOCK(sgpio_lock);
-#define SCLOCK 0
-#define SLOAD 1
-#define SDATA 2
-#define SGPIO_PINS 3
-#define SGPIO_PORTS 8
-
-struct ecx_plat_data {
- u32 n_ports;
- /* number of extra clocks that the SGPIO PIC controller expects */
- u32 pre_clocks;
- u32 post_clocks;
- struct gpio_desc *sgpio_gpiod[SGPIO_PINS];
- u32 sgpio_pattern;
- u32 port_to_sgpio[SGPIO_PORTS];
-};
-
-#define SGPIO_SIGNALS 3
-#define ECX_ACTIVITY_BITS 0x300000
-#define ECX_ACTIVITY_SHIFT 0
-#define ECX_LOCATE_BITS 0x80000
-#define ECX_LOCATE_SHIFT 1
-#define ECX_FAULT_BITS 0x400000
-#define ECX_FAULT_SHIFT 2
-static inline int sgpio_bit_shift(struct ecx_plat_data *pdata, u32 port,
- u32 shift)
-{
- return 1 << (3 * pdata->port_to_sgpio[port] + shift);
-}
-
-static void ecx_parse_sgpio(struct ecx_plat_data *pdata, u32 port, u32 state)
-{
- if (state & ECX_ACTIVITY_BITS)
- pdata->sgpio_pattern |= sgpio_bit_shift(pdata, port,
- ECX_ACTIVITY_SHIFT);
- else
- pdata->sgpio_pattern &= ~sgpio_bit_shift(pdata, port,
- ECX_ACTIVITY_SHIFT);
- if (state & ECX_LOCATE_BITS)
- pdata->sgpio_pattern |= sgpio_bit_shift(pdata, port,
- ECX_LOCATE_SHIFT);
- else
- pdata->sgpio_pattern &= ~sgpio_bit_shift(pdata, port,
- ECX_LOCATE_SHIFT);
- if (state & ECX_FAULT_BITS)
- pdata->sgpio_pattern |= sgpio_bit_shift(pdata, port,
- ECX_FAULT_SHIFT);
- else
- pdata->sgpio_pattern &= ~sgpio_bit_shift(pdata, port,
- ECX_FAULT_SHIFT);
-}
-
-/*
- * Tell the LED controller that the signal has changed by raising the clock
- * line for 50 uS and then lowering it for 50 uS.
- */
-static void ecx_led_cycle_clock(struct ecx_plat_data *pdata)
-{
- gpiod_set_value(pdata->sgpio_gpiod[SCLOCK], 1);
- udelay(50);
- gpiod_set_value(pdata->sgpio_gpiod[SCLOCK], 0);
- udelay(50);
-}
-
-static ssize_t ecx_transmit_led_message(struct ata_port *ap, u32 state,
- ssize_t size)
-{
- struct ahci_host_priv *hpriv = ap->host->private_data;
- struct ecx_plat_data *pdata = hpriv->plat_data;
- struct ahci_port_priv *pp = ap->private_data;
- unsigned long flags;
- int pmp, i;
- struct ahci_em_priv *emp;
- u32 sgpio_out;
-
- /* get the slot number from the message */
- pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
- if (pmp < EM_MAX_SLOTS)
- emp = &pp->em_priv[pmp];
- else
- return -EINVAL;
-
- if (!(hpriv->em_msg_type & EM_MSG_TYPE_LED))
- return size;
-
- spin_lock_irqsave(&sgpio_lock, flags);
- ecx_parse_sgpio(pdata, ap->port_no, state);
- sgpio_out = pdata->sgpio_pattern;
- for (i = 0; i < pdata->pre_clocks; i++)
- ecx_led_cycle_clock(pdata);
-
- gpiod_set_value(pdata->sgpio_gpiod[SLOAD], 1);
- ecx_led_cycle_clock(pdata);
- gpiod_set_value(pdata->sgpio_gpiod[SLOAD], 0);
- /*
- * bit-bang out the SGPIO pattern, by consuming a bit and then
- * clocking it out.
- */
- for (i = 0; i < (SGPIO_SIGNALS * pdata->n_ports); i++) {
- gpiod_set_value(pdata->sgpio_gpiod[SDATA], sgpio_out & 1);
- sgpio_out >>= 1;
- ecx_led_cycle_clock(pdata);
- }
- for (i = 0; i < pdata->post_clocks; i++)
- ecx_led_cycle_clock(pdata);
-
- /* save off new led state for port/slot */
- emp->led_state = state;
-
- spin_unlock_irqrestore(&sgpio_lock, flags);
- return size;
-}
-
-static void highbank_set_em_messages(struct device *dev,
- struct ahci_host_priv *hpriv,
- struct ata_port_info *pi)
-{
- struct device_node *np = dev->of_node;
- struct ecx_plat_data *pdata = hpriv->plat_data;
- int i;
-
- for (i = 0; i < SGPIO_PINS; i++) {
- struct gpio_desc *gpiod;
-
- gpiod = devm_gpiod_get_index(dev, "calxeda,sgpio", i,
- GPIOD_OUT_HIGH);
- if (IS_ERR(gpiod)) {
- dev_err(dev, "failed to get GPIO %d\n", i);
- continue;
- }
- gpiod_set_consumer_name(gpiod, "CX SGPIO");
-
- pdata->sgpio_gpiod[i] = gpiod;
- }
- of_property_read_u32_array(np, "calxeda,led-order",
- pdata->port_to_sgpio,
- pdata->n_ports);
- if (of_property_read_u32(np, "calxeda,pre-clocks", &pdata->pre_clocks))
- pdata->pre_clocks = 0;
- if (of_property_read_u32(np, "calxeda,post-clocks",
- &pdata->post_clocks))
- pdata->post_clocks = 0;
-
- /* store em_loc */
- hpriv->em_loc = 0;
- hpriv->em_buf_sz = 4;
- hpriv->em_msg_type = EM_MSG_TYPE_LED;
- pi->flags |= ATA_FLAG_EM | ATA_FLAG_SW_ACTIVITY;
-}
-
-static u32 __combo_phy_reg_read(u8 sata_port, u32 addr)
-{
- u32 data;
- u8 dev = port_data[sata_port].phy_devs;
- spin_lock(&cphy_lock);
- writel(CPHY_MAP(dev, addr), port_data[sata_port].phy_base + 0x800);
- data = readl(port_data[sata_port].phy_base + CPHY_ADDR(addr));
- spin_unlock(&cphy_lock);
- return data;
-}
-
-static void __combo_phy_reg_write(u8 sata_port, u32 addr, u32 data)
-{
- u8 dev = port_data[sata_port].phy_devs;
- spin_lock(&cphy_lock);
- writel(CPHY_MAP(dev, addr), port_data[sata_port].phy_base + 0x800);
- writel(data, port_data[sata_port].phy_base + CPHY_ADDR(addr));
- spin_unlock(&cphy_lock);
-}
-
-static void combo_phy_wait_for_ready(u8 sata_port)
-{
- while (__combo_phy_reg_read(sata_port, SERDES_CR_CTL) & CR_BUSY)
- udelay(5);
-}
-
-static u32 combo_phy_read(u8 sata_port, u32 addr)
-{
- combo_phy_wait_for_ready(sata_port);
- __combo_phy_reg_write(sata_port, SERDES_CR_ADDR, addr);
- __combo_phy_reg_write(sata_port, SERDES_CR_CTL, CR_START);
- combo_phy_wait_for_ready(sata_port);
- return __combo_phy_reg_read(sata_port, SERDES_CR_DATA);
-}
-
-static void combo_phy_write(u8 sata_port, u32 addr, u32 data)
-{
- combo_phy_wait_for_ready(sata_port);
- __combo_phy_reg_write(sata_port, SERDES_CR_ADDR, addr);
- __combo_phy_reg_write(sata_port, SERDES_CR_DATA, data);
- __combo_phy_reg_write(sata_port, SERDES_CR_CTL, CR_WR_RDN | CR_START);
-}
-
-static void highbank_cphy_disable_overrides(u8 sata_port)
-{
- u8 lane = port_data[sata_port].lane_mapping;
- u32 tmp;
- if (unlikely(port_data[sata_port].phy_base == NULL))
- return;
- tmp = combo_phy_read(sata_port, CPHY_RX_INPUT_STS + lane * SPHY_LANE);
- tmp &= ~CPHY_SATA_RX_OVERRIDE;
- combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
-}
-
-static void cphy_override_tx_attenuation(u8 sata_port, u32 val)
-{
- u8 lane = port_data[sata_port].lane_mapping;
- u32 tmp;
-
- if (val & 0x8)
- return;
-
- tmp = combo_phy_read(sata_port, CPHY_TX_INPUT_STS + lane * SPHY_LANE);
- tmp &= ~CPHY_SATA_TX_OVERRIDE;
- combo_phy_write(sata_port, CPHY_TX_OVERRIDE + lane * SPHY_LANE, tmp);
-
- tmp |= CPHY_SATA_TX_OVERRIDE;
- combo_phy_write(sata_port, CPHY_TX_OVERRIDE + lane * SPHY_LANE, tmp);
-
- tmp |= (val << CPHY_SATA_TX_ATTEN_SHIFT) & CPHY_SATA_TX_ATTEN;
- combo_phy_write(sata_port, CPHY_TX_OVERRIDE + lane * SPHY_LANE, tmp);
-}
-
-static void cphy_override_rx_mode(u8 sata_port, u32 val)
-{
- u8 lane = port_data[sata_port].lane_mapping;
- u32 tmp;
- tmp = combo_phy_read(sata_port, CPHY_RX_INPUT_STS + lane * SPHY_LANE);
- tmp &= ~CPHY_SATA_RX_OVERRIDE;
- combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
-
- tmp |= CPHY_SATA_RX_OVERRIDE;
- combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
-
- tmp &= ~CPHY_SATA_DPLL_MODE;
- tmp |= val << CPHY_SATA_DPLL_SHIFT;
- combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
-
- tmp |= CPHY_SATA_DPLL_RESET;
- combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
-
- tmp &= ~CPHY_SATA_DPLL_RESET;
- combo_phy_write(sata_port, CPHY_RX_OVERRIDE + lane * SPHY_LANE, tmp);
-
- msleep(15);
-}
-
-static void highbank_cphy_override_lane(u8 sata_port)
-{
- u8 lane = port_data[sata_port].lane_mapping;
- u32 tmp, k = 0;
-
- if (unlikely(port_data[sata_port].phy_base == NULL))
- return;
- do {
- tmp = combo_phy_read(sata_port, CPHY_RX_INPUT_STS +
- lane * SPHY_LANE);
- } while ((tmp & SPHY_HALF_RATE) && (k++ < 1000));
- cphy_override_rx_mode(sata_port, 3);
- cphy_override_tx_attenuation(sata_port, port_data[sata_port].tx_atten);
-}
-
-static int highbank_initialize_phys(struct device *dev, void __iomem *addr)
-{
- struct device_node *sata_node = dev->of_node;
- int phy_count = 0, phy, port = 0, i;
- void __iomem *cphy_base[CPHY_PHY_COUNT] = {};
- struct device_node *phy_nodes[CPHY_PHY_COUNT] = {};
- u32 tx_atten[CPHY_PORT_COUNT] = {};
-
- memset(port_data, 0, sizeof(struct phy_lane_info) * CPHY_PORT_COUNT);
-
- do {
- u32 tmp;
- struct of_phandle_args phy_data;
- if (of_parse_phandle_with_args(sata_node,
- "calxeda,port-phys", "#phy-cells",
- port, &phy_data))
- break;
- for (phy = 0; phy < phy_count; phy++) {
- if (phy_nodes[phy] == phy_data.np)
- break;
- }
- if (phy_nodes[phy] == NULL) {
- phy_nodes[phy] = phy_data.np;
- cphy_base[phy] = of_iomap(phy_nodes[phy], 0);
- if (cphy_base[phy] == NULL) {
- return 0;
- }
- phy_count += 1;
- }
- port_data[port].lane_mapping = phy_data.args[0];
- of_property_read_u32(phy_nodes[phy], "phydev", &tmp);
- port_data[port].phy_devs = tmp;
- port_data[port].phy_base = cphy_base[phy];
- of_node_put(phy_data.np);
- port += 1;
- } while (port < CPHY_PORT_COUNT);
- of_property_read_u32_array(sata_node, "calxeda,tx-atten",
- tx_atten, port);
- for (i = 0; i < port; i++)
- port_data[i].tx_atten = (u8) tx_atten[i];
- return 0;
-}
-
-/*
- * The Calxeda SATA phy intermittently fails to bring up a link with Gen3
- * Retrying the phy hard reset can work around the issue, but the drive
- * may fail again. In less than 150 out of 15000 test runs, it took more
- * than 10 tries for the link to be established (but never more than 35).
- * Triple the maximum observed retry count to provide plenty of margin for
- * rare events and to guarantee that the link is established.
- *
- * Also, the default 2 second time-out on a failed drive is too long in
- * this situation. The uboot implementation of the same driver function
- * uses a much shorter time-out period and never experiences a time out
- * issue. Reducing the time-out to 500ms improves the responsiveness.
- * The other timing constants were kept the same as the stock AHCI driver.
- * This change was also tested 15000 times on 24 drives and none of them
- * experienced a time out.
- */
-static int ahci_highbank_hardreset(struct ata_link *link, unsigned int *class,
- unsigned long deadline)
-{
- static const unsigned long timing[] = { 5, 100, 500};
- struct ata_port *ap = link->ap;
- struct ahci_port_priv *pp = ap->private_data;
- struct ahci_host_priv *hpriv = ap->host->private_data;
- u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
- struct ata_taskfile tf;
- bool online;
- u32 sstatus;
- int rc;
- int retry = 100;
-
- hpriv->stop_engine(ap);
-
- /* 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@xxxxxxxxxxx>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("sata:highbank");
--
2.20.1