3 files changed, 224 insertions, 55 deletions

diff --git a/arch/arm/mach-orion5x/Kconfig b/arch/arm/mach-orion5x/Kconfig
index f59a8d0e0824..2c7035d8dcbf 100644
--- a/arch/arm/mach-orion5x/Kconfig
+++ b/arch/arm/mach-orion5x/Kconfig
@@ -71,6 +71,7 @@ config MACH_WRT350N_V2
 
 config MACH_TS78XX
         bool "Technologic Systems TS-78xx"
+        select PM
         help
           Say 'Y' here if you want your kernel to support the
           Technologic Systems TS-78xx platform.
diff --git a/arch/arm/mach-orion5x/ts78xx-fpga.h b/arch/arm/mach-orion5x/ts78xx-fpga.h
new file mode 100644
index 000000000000..0b8e30faff14
--- /dev/null
+++ b/arch/arm/mach-orion5x/ts78xx-fpga.h
@@ -0,0 +1,27 @@
+#define FPGAID(_magic, _rev) ((_magic << 8) + _rev)
+
+/*
+ * get yer id's from http://ts78xx.digriz.org.uk/
+ * do *not* make up your own or 'borrow' any!
+ */
+enum fpga_ids {
+        /* Technologic Systems */
+        TS7800_REV_B = FPGAID(0x00b480, 0x03),
+};
+
+struct fpga_device {
+        unsigned                present:1;
+        unsigned                init:1;
+};
+
+struct fpga_devices {
+        /* Technologic Systems */
+        struct fpga_device      ts_rtc;
+};
+
+struct ts78xx_fpga_data {
+        unsigned int            id;
+        int                     state;
+
+        struct fpga_devices     supports;
+};
diff --git a/arch/arm/mach-orion5x/ts78xx-setup.c b/arch/arm/mach-orion5x/ts78xx-setup.c
index b194956518a2..baa25d0fd5c9 100644
--- a/arch/arm/mach-orion5x/ts78xx-setup.c
+++ b/arch/arm/mach-orion5x/ts78xx-setup.c
@@ -10,6 +10,7 @@
 
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/sysfs.h>
 #include <linux/platform_device.h>
 #include <linux/mv643xx_eth.h>
 #include <linux/ata_platform.h>
@@ -20,6 +21,7 @@
 #include <mach/orion5x.h>
 #include "common.h"
 #include "mpp.h"
+#include "ts78xx-fpga.h"
 
 /*****************************************************************************
  * TS-78xx Info
@@ -32,12 +34,11 @@
 #define TS78XX_FPGA_REGS_VIRT_BASE      0xff900000
 #define TS78XX_FPGA_REGS_SIZE           SZ_1M
 
-#define TS78XX_FPGA_REGS_SYSCON_ID      (TS78XX_FPGA_REGS_VIRT_BASE | 0x000)
-#define TS78XX_FPGA_REGS_SYSCON_LCDI    (TS78XX_FPGA_REGS_VIRT_BASE | 0x004)
-#define TS78XX_FPGA_REGS_SYSCON_LCDO    (TS78XX_FPGA_REGS_VIRT_BASE | 0x008)
-
-#define TS78XX_FPGA_REGS_RTC_CTRL       (TS78XX_FPGA_REGS_VIRT_BASE | 0x808)
-#define TS78XX_FPGA_REGS_RTC_DATA       (TS78XX_FPGA_REGS_VIRT_BASE | 0x80c)
+static struct ts78xx_fpga_data ts78xx_fpga = {
+        .id             = 0,
+        .state          = 1,
+/*      .supports       = ... - populated by ts78xx_fpga_supports() */
+};
 
 /*****************************************************************************
  * I/O Address Mapping
@@ -65,31 +66,41 @@ static struct mv643xx_eth_platform_data ts78xx_eth_data = {
 };
 
 /*****************************************************************************
+ * SATA
+ ****************************************************************************/
+static struct mv_sata_platform_data ts78xx_sata_data = {
+        .n_ports        = 2,
+};
+
+/*****************************************************************************
  * RTC M48T86 - nicked^Wborrowed from arch/arm/mach-ep93xx/ts72xx.c
  ****************************************************************************/
 #ifdef CONFIG_RTC_DRV_M48T86
-static unsigned char ts78xx_rtc_readbyte(unsigned long addr)
+#define TS_RTC_CTRL     (TS78XX_FPGA_REGS_VIRT_BASE | 0x808)
+#define TS_RTC_DATA     (TS78XX_FPGA_REGS_VIRT_BASE | 0x80c)
+
+static unsigned char ts78xx_ts_rtc_readbyte(unsigned long addr)
 {
-        writeb(addr, TS78XX_FPGA_REGS_RTC_CTRL);
-        return readb(TS78XX_FPGA_REGS_RTC_DATA);
+        writeb(addr, TS_RTC_CTRL);
+        return readb(TS_RTC_DATA);
 }
 
-static void ts78xx_rtc_writebyte(unsigned char value, unsigned long addr)
+static void ts78xx_ts_rtc_writebyte(unsigned char value, unsigned long addr)
 {
-        writeb(addr, TS78XX_FPGA_REGS_RTC_CTRL);
-        writeb(value, TS78XX_FPGA_REGS_RTC_DATA);
+        writeb(addr, TS_RTC_CTRL);
+        writeb(value, TS_RTC_DATA);
 }
 
-static struct m48t86_ops ts78xx_rtc_ops = {
-        .readbyte       = ts78xx_rtc_readbyte,
-        .writebyte      = ts78xx_rtc_writebyte,
+static struct m48t86_ops ts78xx_ts_rtc_ops = {
+        .readbyte       = ts78xx_ts_rtc_readbyte,
+        .writebyte      = ts78xx_ts_rtc_writebyte,
 };
 
-static struct platform_device ts78xx_rtc_device = {
+static struct platform_device ts78xx_ts_rtc_device = {
         .name           = "rtc-m48t86",
         .id             = -1,
         .dev            = {
-                .platform_data  = &ts78xx_rtc_ops,
+                .platform_data  = &ts78xx_ts_rtc_ops,
         },
         .num_resources  = 0,
 };
@@ -104,59 +115,185 @@ static struct platform_device ts78xx_rtc_device = {
  * TODO: track down a guinea pig without an RTC to see if we can work out a
  *              better RTC detection routine
  */
-static int __init ts78xx_rtc_init(void)
+static int ts78xx_ts_rtc_load(void)
 {
         unsigned char tmp_rtc0, tmp_rtc1;
 
-        tmp_rtc0 = ts78xx_rtc_readbyte(126);
-        tmp_rtc1 = ts78xx_rtc_readbyte(127);
-
-        ts78xx_rtc_writebyte(0x00, 126);
-        ts78xx_rtc_writebyte(0x55, 127);
-        if (ts78xx_rtc_readbyte(127) == 0x55) {
-                ts78xx_rtc_writebyte(0xaa, 127);
-                if (ts78xx_rtc_readbyte(127) == 0xaa
-                                && ts78xx_rtc_readbyte(126) == 0x00) {
-                        ts78xx_rtc_writebyte(tmp_rtc0, 126);
-                        ts78xx_rtc_writebyte(tmp_rtc1, 127);
-                        platform_device_register(&ts78xx_rtc_device);
-                        return 1;
+        tmp_rtc0 = ts78xx_ts_rtc_readbyte(126);
+        tmp_rtc1 = ts78xx_ts_rtc_readbyte(127);
+
+        ts78xx_ts_rtc_writebyte(0x00, 126);
+        ts78xx_ts_rtc_writebyte(0x55, 127);
+        if (ts78xx_ts_rtc_readbyte(127) == 0x55) {
+                ts78xx_ts_rtc_writebyte(0xaa, 127);
+                if (ts78xx_ts_rtc_readbyte(127) == 0xaa
+                                && ts78xx_ts_rtc_readbyte(126) == 0x00) {
+                        ts78xx_ts_rtc_writebyte(tmp_rtc0, 126);
+                        ts78xx_ts_rtc_writebyte(tmp_rtc1, 127);
+                        if (ts78xx_fpga.supports.ts_rtc.init == 0) {
+                                ts78xx_fpga.supports.ts_rtc.init = 1;
+                                platform_device_register(&ts78xx_ts_rtc_device);
+                        } else
+                                platform_device_add(&ts78xx_ts_rtc_device);
+                        return 0;
                 }
         }
 
-        return 0;
+        ts78xx_fpga.supports.ts_rtc.present = 0;
+        return -ENODEV;
 };
+
+static void ts78xx_ts_rtc_unload(void)
+{
+        platform_device_del(&ts78xx_ts_rtc_device);
+}
 #else
-static int __init ts78xx_rtc_init(void)
+static int ts78xx_ts_rtc_load(void)
 {
         return 0;
 }
+
+static void ts78xx_ts_rtc_unload(void)
+{
+}
 #endif
 
 /*****************************************************************************
- * SATA
+ * FPGA 'hotplug' support code
  ****************************************************************************/
-static struct mv_sata_platform_data ts78xx_sata_data = {
-        .n_ports        = 2,
+static void ts78xx_fpga_devices_zero_init(void)
+{
+        ts78xx_fpga.supports.ts_rtc.init = 0;
+}
+
+static void ts78xx_fpga_supports(void)
+{
+        /* TODO: put this 'table' into ts78xx-fpga.h */
+        switch (ts78xx_fpga.id) {
+        case TS7800_REV_B:
+                ts78xx_fpga.supports.ts_rtc.present = 1;
+                break;
+        default:
+                ts78xx_fpga.supports.ts_rtc.present = 0;
+        }
+}
+
+static int ts78xx_fpga_load_devices(void)
+{
+        int tmp, ret = 0;
+
+        if (ts78xx_fpga.supports.ts_rtc.present == 1) {
+                tmp = ts78xx_ts_rtc_load();
+                if (tmp)
+                        printk(KERN_INFO "TS-78xx RTC not detected or enabled\n");
+                ret |= tmp;
+        }
+
+        return ret;
+}
+
+static int ts78xx_fpga_unload_devices(void)
+{
+        int ret = 0;
+
+        if (ts78xx_fpga.supports.ts_rtc.present == 1)
+                ts78xx_ts_rtc_unload();
+
+        return ret;
+}
+
+static int ts78xx_fpga_load(void)
+{
+        ts78xx_fpga.id = readl(TS78XX_FPGA_REGS_VIRT_BASE);
+
+        printk(KERN_INFO "TS-78xx FPGA: magic=0x%.6x, rev=0x%.2x\n",
+                        (ts78xx_fpga.id >> 8) & 0xffffff,
+                        ts78xx_fpga.id & 0xff);
+
+        ts78xx_fpga_supports();
+
+        if (ts78xx_fpga_load_devices()) {
+                ts78xx_fpga.state = -1;
+                return -EBUSY;
+        }
+
+        return 0;
 };
 
-/*****************************************************************************
- * print some information regarding the board
- ****************************************************************************/
-static void __init ts78xx_print_board_id(void)
-{
-        unsigned int board_info;
-
-        board_info = readl(TS78XX_FPGA_REGS_SYSCON_ID);
-        printk(KERN_INFO "TS-78xx Info: FPGA rev=%.2x, Board Magic=%.6x, ",
-                                board_info & 0xff,
-                                (board_info >> 8) & 0xffffff);
-        board_info = readl(TS78XX_FPGA_REGS_SYSCON_LCDI);
-        printk("JP1=%d, JP2=%d\n",
-                                (board_info >> 30) & 0x1,
-                                (board_info >> 31) & 0x1);
+static int ts78xx_fpga_unload(void)
+{
+        unsigned int fpga_id;
+
+        fpga_id = readl(TS78XX_FPGA_REGS_VIRT_BASE);
+
+        /*
+         * There does not seem to be a feasible way to block access to the GPIO
+         * pins from userspace (/dev/mem).  This if clause should hopefully warn
+         * those foolish enough not to follow 'policy' :)
+         *
+         * UrJTAG SVN since r1381 can be used to reprogram the FPGA
+         */
+        if (ts78xx_fpga.id != fpga_id) {
+                printk(KERN_ERR "TS-78xx FPGA: magic/rev mismatch\n"
+                        "TS-78xx FPGA: was 0x%.6x/%.2x but now 0x%.6x/%.2x\n",
+                        (ts78xx_fpga.id >> 8) & 0xffffff, ts78xx_fpga.id & 0xff,
+                        (fpga_id >> 8) & 0xffffff, fpga_id & 0xff);
+                ts78xx_fpga.state = -1;
+                return -EBUSY;
+        }
+
+        if (ts78xx_fpga_unload_devices()) {
+                ts78xx_fpga.state = -1;
+                return -EBUSY;
+        }
+
+        return 0;
 };
 
+static ssize_t ts78xx_fpga_show(struct kobject *kobj,
+                        struct kobj_attribute *attr, char *buf)
+{
+        if (ts78xx_fpga.state < 0)
+                return sprintf(buf, "borked\n");
+
+        return sprintf(buf, "%s\n", (ts78xx_fpga.state) ? "online" : "offline");
+}
+
+static ssize_t ts78xx_fpga_store(struct kobject *kobj,
+                        struct kobj_attribute *attr, const char *buf, size_t n)
+{
+        int value, ret;
+
+        if (ts78xx_fpga.state < 0) {
+                printk(KERN_ERR "TS-78xx FPGA: borked, you must powercycle asap\n");
+                return -EBUSY;
+        }
+
+        if (strncmp(buf, "online", sizeof("online") - 1) == 0)
+                value = 1;
+        else if (strncmp(buf, "offline", sizeof("offline") - 1) == 0)
+                value = 0;
+        else {
+                printk(KERN_ERR "ts78xx_fpga_store: Invalid value\n");
+                return -EINVAL;
+        }
+
+        if (ts78xx_fpga.state == value)
+                return n;
+
+        ret = (ts78xx_fpga.state == 0)
+                ? ts78xx_fpga_load()
+                : ts78xx_fpga_unload();
+
+        if (!(ret < 0))
+                ts78xx_fpga.state = value;
+
+        return n;
+}
+
+static struct kobj_attribute ts78xx_fpga_attr =
+        __ATTR(ts78xx_fpga, 0644, ts78xx_fpga_show, ts78xx_fpga_store);
+
 /*****************************************************************************
  * General Setup
  ****************************************************************************/
@@ -194,13 +331,13 @@ static struct orion5x_mpp_mode ts78xx_mpp_modes[] __initdata = {
 
 static void __init ts78xx_init(void)
 {
+        int ret;
+
         /*
          * Setup basic Orion functions. Need to be called early.
          */
         orion5x_init();
 
-        ts78xx_print_board_id();
-
         orion5x_mpp_conf(ts78xx_mpp_modes);
 
         /*
@@ -214,8 +351,12 @@ static void __init ts78xx_init(void)
         orion5x_uart1_init();
         orion5x_xor_init();
 
-        if (!ts78xx_rtc_init())
-                printk(KERN_INFO "TS-78xx RTC not detected or enabled\n");
+        /* FPGA init */
+        ts78xx_fpga_devices_zero_init();
+        ret = ts78xx_fpga_load();
+        ret = sysfs_create_file(power_kobj, &ts78xx_fpga_attr.attr);
+        if (ret)
+                printk(KERN_ERR "sysfs_create_file failed: %d\n", ret);
 }
 
 MACHINE_START(TS78XX, "Technologic Systems TS-78xx SBC")