#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>
#include <mach/orion5x.h>
#include "common.h"
#include "mpp.h"
+#include "ts78xx-fpga.h"
/*****************************************************************************
* TS-78xx Info
#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
.phy_addr = MV643XX_ETH_PHY_ADDR(0),
};
+/*****************************************************************************
+ * 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,
};
* 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
****************************************************************************/
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);
/*
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")
git.openpandora.org / pandora-kernel.git / commitdiff