memstick: set PMOS values propery for JMicron 38x controllers

Add a function jmb38x_ms_pmos() to enable / disable PMOS setups for
JMicron 38x controllers.

Signed-off-by: Aries Lee <arieslee@jmicron.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 33 insertions, 4 deletions

diff --git a/drivers/memstick/host/jmb38x_ms.c b/drivers/memstick/host/jmb38x_ms.c
index c90ba5082252..4ce8773fa3b8 100644
--- a/drivers/memstick/host/jmb38x_ms.c
+++ b/drivers/memstick/host/jmb38x_ms.c
@@ -758,6 +758,35 @@ static int jmb38x_ms_set_param(struct memstick_host *msh,
         return 0;
 }
 
+#define PCI_PMOS0_CONTROL               0xae
+#define  PMOS0_ENABLE                   0x01
+#define  PMOS0_OVERCURRENT_LEVEL_2_4V   0x06
+#define  PMOS0_EN_OVERCURRENT_DEBOUNCE  0x40
+#define  PMOS0_SW_LED_POLARITY_ENABLE   0x80
+#define  PMOS0_ACTIVE_BITS (PMOS0_ENABLE | PMOS0_EN_OVERCURRENT_DEBOUNCE | \
+                            PMOS0_OVERCURRENT_LEVEL_2_4V)
+#define PCI_CLOCK_CTL                   0xb9
+
+static int jmb38x_ms_pmos(struct pci_dev *pdev, int flag)
+{
+        unsigned char val;
+
+        pci_read_config_byte(pdev, PCI_PMOS0_CONTROL, &val);
+        if (flag)
+                val |= PMOS0_ACTIVE_BITS;
+        else
+                val &= ~PMOS0_ACTIVE_BITS;
+        pci_write_config_byte(pdev, PCI_PMOS0_CONTROL, val);
+        dev_dbg(&pdev->dev, "JMB38x: set PMOS0 val 0x%x\n", val);
+
+        pci_read_config_byte(pdev, PCI_CLOCK_CTL, &val);
+        pci_write_config_byte(pdev, PCI_CLOCK_CTL, val & ~0x0f);
+        pci_write_config_byte(pdev, PCI_CLOCK_CTL, val | 0x01);
+        dev_dbg(&pdev->dev, "Clock Control by PCI config is disabled!\n");
+
+        return 0;
+}
+
 #ifdef CONFIG_PM
 
 static int jmb38x_ms_suspend(struct pci_dev *dev, pm_message_t state)
@@ -790,8 +819,7 @@ static int jmb38x_ms_resume(struct pci_dev *dev)
                 return rc;
         pci_set_master(dev);
 
-        pci_read_config_dword(dev, 0xac, &rc);
-        pci_write_config_dword(dev, 0xac, rc | 0x00470000);
+        jmb38x_ms_pmos(dev, 1);
 
         for (rc = 0; rc < jm->host_cnt; ++rc) {
                 if (!jm->hosts[rc])
@@ -900,8 +928,7 @@ static int jmb38x_ms_probe(struct pci_dev *pdev,
                 goto err_out;
         }
 
-        pci_read_config_dword(pdev, 0xac, &rc);
-        pci_write_config_dword(pdev, 0xac, rc | 0x00470000);
+        jmb38x_ms_pmos(pdev, 1);
 
         cnt = jmb38x_ms_count_slots(pdev);
         if (!cnt) {
@@ -982,6 +1009,8 @@ static void jmb38x_ms_remove(struct pci_dev *dev)
                 jmb38x_ms_free_host(jm->hosts[cnt]);
         }
 
+        jmb38x_ms_pmos(dev, 0);
+
         pci_set_drvdata(dev, NULL);
         pci_release_regions(dev);
         pci_disable_device(dev);