target/linux/ipq806x/patches/0087-tty-serial-msm-Remove-direct-access-to-GSBI.patch

   1 From 025909cbf933cc20c2ff5ea9f87de8e17a739a08 Mon Sep 17 00:00:00 2001
   2 From: Andy Gross <agross@codeaurora.org>
   3 Date: Thu, 24 Apr 2014 11:31:22 -0500
   4 Subject: [PATCH 087/182] tty: serial: msm: Remove direct access to GSBI
   5
   6 This patch removes direct access of the GSBI registers.  GSBI configuration
   7 should be done through the GSBI driver directly.
   8
   9 Signed-off-by: Andy Gross <agross@codeaurora.org>
  10 Signed-off-by: Kumar Gala <galak@codeaurora.org>
  11 ---
  12  drivers/tty/serial/msm_serial.c |   48 ++-------------------------------------
  13  drivers/tty/serial/msm_serial.h |    5 ----
  14  2 files changed, 2 insertions(+), 51 deletions(-)
  15
  16 --- a/drivers/tty/serial/msm_serial.c
  17 +++ b/drivers/tty/serial/msm_serial.c
  18 @@ -52,7 +52,6 @@ struct msm_port {
  19         struct clk              *clk;
  20         struct clk              *pclk;
  21         unsigned int            imr;
  22 -       void __iomem            *gsbi_base;
  23         int                     is_uartdm;
  24         unsigned int            old_snap_state;
  25  };
  26 @@ -599,9 +598,7 @@ static const char *msm_type(struct uart_
  27  static void msm_release_port(struct uart_port *port)
  28  {
  29         struct platform_device *pdev = to_platform_device(port->dev);
  30 -       struct msm_port *msm_port = UART_TO_MSM(port);
  31         struct resource *uart_resource;
  32 -       struct resource *gsbi_resource;
  33         resource_size_t size;
  34
  35         uart_resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  36 @@ -612,28 +609,12 @@ static void msm_release_port(struct uart
  37         release_mem_region(port->mapbase, size);
  38         iounmap(port->membase);
  39         port->membase = NULL;
  40 -
  41 -       if (msm_port->gsbi_base) {
  42 -               writel_relaxed(GSBI_PROTOCOL_IDLE,
  43 -                               msm_port->gsbi_base + GSBI_CONTROL);
  44 -
  45 -               gsbi_resource = platform_get_resource(pdev, IORESOURCE_MEM, 1);
  46 -               if (unlikely(!gsbi_resource))
  47 -                       return;
  48 -
  49 -               size = resource_size(gsbi_resource);
  50 -               release_mem_region(gsbi_resource->start, size);
  51 -               iounmap(msm_port->gsbi_base);
  52 -               msm_port->gsbi_base = NULL;
  53 -       }
  54  }
  55
  56  static int msm_request_port(struct uart_port *port)
  57  {
  58 -       struct msm_port *msm_port = UART_TO_MSM(port);
  59         struct platform_device *pdev = to_platform_device(port->dev);
  60         struct resource *uart_resource;
  61 -       struct resource *gsbi_resource;
  62         resource_size_t size;
  63         int ret;
  64
  65 @@ -652,30 +633,8 @@ static int msm_request_port(struct uart_
  66                 goto fail_release_port;
  67         }
  68
  69 -       gsbi_resource = platform_get_resource(pdev, IORESOURCE_MEM, 1);
  70 -       /* Is this a GSBI-based port? */
  71 -       if (gsbi_resource) {
  72 -               size = resource_size(gsbi_resource);
  73 -
  74 -               if (!request_mem_region(gsbi_resource->start, size,
  75 -                                                "msm_serial")) {
  76 -                       ret = -EBUSY;
  77 -                       goto fail_release_port_membase;
  78 -               }
  79 -
  80 -               msm_port->gsbi_base = ioremap(gsbi_resource->start, size);
  81 -               if (!msm_port->gsbi_base) {
  82 -                       ret = -EBUSY;
  83 -                       goto fail_release_gsbi;
  84 -               }
  85 -       }
  86 -
  87         return 0;
  88
  89 -fail_release_gsbi:
  90 -       release_mem_region(gsbi_resource->start, size);
  91 -fail_release_port_membase:
  92 -       iounmap(port->membase);
  93  fail_release_port:
  94         release_mem_region(port->mapbase, size);
  95         return ret;
  96 @@ -683,7 +642,6 @@ fail_release_port:
  97
  98  static void msm_config_port(struct uart_port *port, int flags)
  99  {
 100 -       struct msm_port *msm_port = UART_TO_MSM(port);
 101         int ret;
 102         if (flags & UART_CONFIG_TYPE) {
 103                 port->type = PORT_MSM;
 104 @@ -691,9 +649,6 @@ static void msm_config_port(struct uart_
 105                 if (ret)
 106                         return;
 107         }
 108 -       if (msm_port->gsbi_base)
 109 -               writel_relaxed(GSBI_PROTOCOL_UART,
 110 -                               msm_port->gsbi_base + GSBI_CONTROL);
 111  }
 112
 113  static int msm_verify_port(struct uart_port *port, struct serial_struct *ser)
 114 @@ -1110,6 +1065,7 @@ static struct of_device_id msm_match_tab
 115
 116  static struct platform_driver msm_platform_driver = {
 117         .remove = msm_serial_remove,
 118 +       .probe = msm_serial_probe,
 119         .driver = {
 120                 .name = "msm_serial",
 121                 .owner = THIS_MODULE,
 122 @@ -1125,7 +1081,7 @@ static int __init msm_serial_init(void)
 123         if (unlikely(ret))
 124                 return ret;
 125
 126 -       ret = platform_driver_probe(&msm_platform_driver, msm_serial_probe);
 127 +       ret = platform_driver_register(&msm_platform_driver);
 128         if (unlikely(ret))
 129                 uart_unregister_driver(&msm_uart_driver);
 130
 131 --- a/drivers/tty/serial/msm_serial.h
 132 +++ b/drivers/tty/serial/msm_serial.h
 133 @@ -109,11 +109,6 @@
 134  #define UART_ISR               0x0014
 135  #define UART_ISR_TX_READY      (1 << 7)
 136
 137 -#define GSBI_CONTROL           0x0
 138 -#define GSBI_PROTOCOL_CODE     0x30
 139 -#define GSBI_PROTOCOL_UART     0x40
 140 -#define GSBI_PROTOCOL_IDLE     0x0
 141 -
 142  #define UARTDM_RXFS            0x50
 143  #define UARTDM_RXFS_BUF_SHIFT  0x7
 144  #define UARTDM_RXFS_BUF_MASK   0x7