[POWERPC] Linkstation / kurobox support
Support for the Kurobox(HG)/LinkStation-I NAS systems by Buffalo
Technology, should be also applicable to the PPC TeraStation family.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/embedded6xx/Kconfig b/arch/powerpc/platforms/embedded6xx/Kconfig
index 910d50a..ddbe398 100644
--- a/arch/powerpc/platforms/embedded6xx/Kconfig
+++ b/arch/powerpc/platforms/embedded6xx/Kconfig
@@ -74,6 +74,18 @@
Select SANDPOINT if configuring for a Motorola Sandpoint X3
(any flavor).
+config LINKSTATION
+ bool "Linkstation / Kurobox(HG) from Buffalo"
+ select MPIC
+ select FSL_SOC
+ select PPC_UDBG_16550 if SERIAL_8250
+ help
+ Select LINKSTATION if configuring for one of PPC- (MPC8241)
+ based NAS systems from Buffalo Technology. So far only
+ KuroboxHG has been tested. In the future classical Kurobox,
+ Linkstation-I HD-HLAN and HD-HGLAN versions, and PPC-based
+ Terastation systems should be supported too.
+
config MPC7448HPC2
bool "Freescale MPC7448HPC2(Taiga)"
select TSI108_BRIDGE
@@ -196,7 +208,7 @@
depends on SANDPOINT || SPRUCE || PPLUS || \
PRPMC750 || PRPMC800 || LOPEC || \
(EV64260 && !SERIAL_MPSC) || CHESTNUT || RADSTONE_PPC7D || \
- 83xx
+ 83xx || LINKSTATION
default y
config FORCE
@@ -270,13 +282,13 @@
config MPC10X_BRIDGE
bool
- depends on POWERPMC250 || LOPEC || SANDPOINT
+ depends on POWERPMC250 || LOPEC || SANDPOINT || LINKSTATION
select PPC_INDIRECT_PCI
default y
config MPC10X_OPENPIC
bool
- depends on POWERPMC250 || LOPEC || SANDPOINT
+ depends on POWERPMC250 || LOPEC || SANDPOINT || LINKSTATION
default y
config MPC10X_STORE_GATHERING
diff --git a/arch/powerpc/platforms/embedded6xx/Makefile b/arch/powerpc/platforms/embedded6xx/Makefile
index fa499fe..d3d11a3 100644
--- a/arch/powerpc/platforms/embedded6xx/Makefile
+++ b/arch/powerpc/platforms/embedded6xx/Makefile
@@ -2,3 +2,4 @@
# Makefile for the 6xx/7xx/7xxxx linux kernel.
#
obj-$(CONFIG_MPC7448HPC2) += mpc7448_hpc2.o
+obj-$(CONFIG_LINKSTATION) += linkstation.o ls_uart.o
diff --git a/arch/powerpc/platforms/embedded6xx/linkstation.c b/arch/powerpc/platforms/embedded6xx/linkstation.c
new file mode 100644
index 0000000..61599d9
--- /dev/null
+++ b/arch/powerpc/platforms/embedded6xx/linkstation.c
@@ -0,0 +1,211 @@
+/*
+ * Board setup routines for the Buffalo Linkstation / Kurobox Platform.
+ *
+ * Copyright (C) 2006 G. Liakhovetski (g.liakhovetski@gmx.de)
+ *
+ * Based on sandpoint.c by Mark A. Greer
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/initrd.h>
+#include <linux/root_dev.h>
+#include <linux/mtd/physmap.h>
+
+#include <asm/time.h>
+#include <asm/prom.h>
+#include <asm/mpic.h>
+#include <asm/mpc10x.h>
+#include <asm/pci-bridge.h>
+
+static struct mtd_partition linkstation_physmap_partitions[] = {
+ {
+ .name = "mtd_firmimg",
+ .offset = 0x000000,
+ .size = 0x300000,
+ },
+ {
+ .name = "mtd_bootcode",
+ .offset = 0x300000,
+ .size = 0x070000,
+ },
+ {
+ .name = "mtd_status",
+ .offset = 0x370000,
+ .size = 0x010000,
+ },
+ {
+ .name = "mtd_conf",
+ .offset = 0x380000,
+ .size = 0x080000,
+ },
+ {
+ .name = "mtd_allflash",
+ .offset = 0x000000,
+ .size = 0x400000,
+ },
+ {
+ .name = "mtd_data",
+ .offset = 0x310000,
+ .size = 0x0f0000,
+ },
+};
+
+static int __init add_bridge(struct device_node *dev)
+{
+ int len;
+ struct pci_controller *hose;
+ int *bus_range;
+
+ printk("Adding PCI host bridge %s\n", dev->full_name);
+
+ bus_range = (int *) get_property(dev, "bus-range", &len);
+ if (bus_range == NULL || len < 2 * sizeof(int))
+ printk(KERN_WARNING "Can't get bus-range for %s, assume"
+ " bus 0\n", dev->full_name);
+
+ hose = pcibios_alloc_controller();
+ if (hose == NULL)
+ return -ENOMEM;
+ hose->first_busno = bus_range ? bus_range[0] : 0;
+ hose->last_busno = bus_range ? bus_range[1] : 0xff;
+ hose->arch_data = dev;
+ setup_indirect_pci(hose, 0xfec00000, 0xfee00000);
+
+ /* Interpret the "ranges" property */
+ /* This also maps the I/O region and sets isa_io/mem_base */
+ pci_process_bridge_OF_ranges(hose, dev, 1);
+
+ return 0;
+}
+
+static void __init linkstation_setup_arch(void)
+{
+ struct device_node *np;
+#ifdef CONFIG_MTD_PHYSMAP
+ physmap_set_partitions(linkstation_physmap_partitions,
+ ARRAY_SIZE(linkstation_physmap_partitions));
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (initrd_start)
+ ROOT_DEV = Root_RAM0;
+ else
+#endif
+#ifdef CONFIG_ROOT_NFS
+ ROOT_DEV = Root_NFS;
+#else
+ ROOT_DEV = Root_HDA1;
+#endif
+
+ /* Lookup PCI host bridges */
+ for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
+ add_bridge(np);
+
+ printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
+ printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
+}
+
+/*
+ * Interrupt setup and service. Interrrupts on the linkstation come
+ * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
+ */
+static void __init linkstation_init_IRQ(void)
+{
+ struct mpic *mpic;
+ struct device_node *dnp;
+ void *prop;
+ int size;
+ phys_addr_t paddr;
+
+ dnp = of_find_node_by_type(NULL, "open-pic");
+ if (dnp == NULL)
+ return;
+
+ prop = (struct device_node *)get_property(dnp, "reg", &size);
+ paddr = (phys_addr_t)of_translate_address(dnp, prop);
+
+ mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC ");
+ BUG_ON(mpic == NULL);
+
+ /* PCI IRQs */
+ mpic_assign_isu(mpic, 0, paddr + 0x10200);
+
+ /* I2C */
+ mpic_assign_isu(mpic, 1, paddr + 0x11000);
+
+ /* ttyS0, ttyS1 */
+ mpic_assign_isu(mpic, 2, paddr + 0x11100);
+
+ mpic_init(mpic);
+}
+
+extern void avr_uart_configure(void);
+extern void avr_uart_send(const char);
+
+static void linkstation_restart(char *cmd)
+{
+ local_irq_disable();
+
+ /* Reset system via AVR */
+ avr_uart_configure();
+ /* Send reboot command */
+ avr_uart_send('C');
+
+ for(;;) /* Spin until reset happens */
+ avr_uart_send('G'); /* "kick" */
+}
+
+static void linkstation_power_off(void)
+{
+ local_irq_disable();
+
+ /* Power down system via AVR */
+ avr_uart_configure();
+ /* send shutdown command */
+ avr_uart_send('E');
+
+ for(;;) /* Spin until power-off happens */
+ avr_uart_send('G'); /* "kick" */
+ /* NOTREACHED */
+}
+
+static void linkstation_halt(void)
+{
+ linkstation_power_off();
+ /* NOTREACHED */
+}
+
+static void linkstation_show_cpuinfo(struct seq_file *m)
+{
+ seq_printf(m, "vendor\t\t: Buffalo Technology\n");
+ seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
+}
+
+static int __init linkstation_probe(void)
+{
+ unsigned long root;
+
+ root = of_get_flat_dt_root();
+
+ if (!of_flat_dt_is_compatible(root, "linkstation"))
+ return 0;
+ return 1;
+}
+
+define_machine(linkstation){
+ .name = "Buffalo Linkstation",
+ .probe = linkstation_probe,
+ .setup_arch = linkstation_setup_arch,
+ .init_IRQ = linkstation_init_IRQ,
+ .show_cpuinfo = linkstation_show_cpuinfo,
+ .get_irq = mpic_get_irq,
+ .restart = linkstation_restart,
+ .power_off = linkstation_power_off,
+ .halt = linkstation_halt,
+ .calibrate_decr = generic_calibrate_decr,
+};
diff --git a/arch/powerpc/platforms/embedded6xx/ls_uart.c b/arch/powerpc/platforms/embedded6xx/ls_uart.c
new file mode 100644
index 0000000..31bcdae
--- /dev/null
+++ b/arch/powerpc/platforms/embedded6xx/ls_uart.c
@@ -0,0 +1,131 @@
+#include <linux/workqueue.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/serial_reg.h>
+#include <linux/serial_8250.h>
+#include <asm/io.h>
+#include <asm/mpc10x.h>
+#include <asm/ppc_sys.h>
+#include <asm/prom.h>
+#include <asm/termbits.h>
+
+static void __iomem *avr_addr;
+static unsigned long avr_clock;
+
+static struct work_struct wd_work;
+
+static void wd_stop(void *unused)
+{
+ const char string[] = "AAAAFFFFJJJJ>>>>VVVV>>>>ZZZZVVVVKKKK";
+ int i = 0, rescue = 8;
+ int len = strlen(string);
+
+ while (rescue--) {
+ int j;
+ char lsr = in_8(avr_addr + UART_LSR);
+
+ if (lsr & (UART_LSR_THRE | UART_LSR_TEMT)) {
+ for (j = 0; j < 16 && i < len; j++, i++)
+ out_8(avr_addr + UART_TX, string[i]);
+ if (i == len) {
+ /* Read "OK" back: 4ms for the last "KKKK"
+ plus a couple bytes back */
+ msleep(7);
+ printk("linkstation: disarming the AVR watchdog: ");
+ while (in_8(avr_addr + UART_LSR) & UART_LSR_DR)
+ printk("%c", in_8(avr_addr + UART_RX));
+ break;
+ }
+ }
+ msleep(17);
+ }
+ printk("\n");
+}
+
+#define AVR_QUOT(clock) ((clock) + 8 * 9600) / (16 * 9600)
+
+void avr_uart_configure(void)
+{
+ unsigned char cval = UART_LCR_WLEN8;
+ unsigned int quot = AVR_QUOT(avr_clock);
+
+ if (!avr_addr || !avr_clock)
+ return;
+
+ out_8(avr_addr + UART_LCR, cval); /* initialise UART */
+ out_8(avr_addr + UART_MCR, 0);
+ out_8(avr_addr + UART_IER, 0);
+
+ cval |= UART_LCR_STOP | UART_LCR_PARITY | UART_LCR_EPAR;
+
+ out_8(avr_addr + UART_LCR, cval); /* Set character format */
+
+ out_8(avr_addr + UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
+ out_8(avr_addr + UART_DLL, quot & 0xff); /* LS of divisor */
+ out_8(avr_addr + UART_DLM, quot >> 8); /* MS of divisor */
+ out_8(avr_addr + UART_LCR, cval); /* reset DLAB */
+ out_8(avr_addr + UART_FCR, UART_FCR_ENABLE_FIFO); /* enable FIFO */
+}
+
+void avr_uart_send(const char c)
+{
+ if (!avr_addr || !avr_clock)
+ return;
+
+ out_8(avr_addr + UART_TX, c);
+ out_8(avr_addr + UART_TX, c);
+ out_8(avr_addr + UART_TX, c);
+ out_8(avr_addr + UART_TX, c);
+}
+
+static void __init ls_uart_init(void)
+{
+ local_irq_disable();
+
+#ifndef CONFIG_SERIAL_8250
+ out_8(avr_addr + UART_FCR, UART_FCR_ENABLE_FIFO); /* enable FIFO */
+ out_8(avr_addr + UART_FCR, UART_FCR_ENABLE_FIFO |
+ UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); /* clear FIFOs */
+ out_8(avr_addr + UART_FCR, 0);
+ out_8(avr_addr + UART_IER, 0);
+
+ /* Clear up interrupts */
+ (void) in_8(avr_addr + UART_LSR);
+ (void) in_8(avr_addr + UART_RX);
+ (void) in_8(avr_addr + UART_IIR);
+ (void) in_8(avr_addr + UART_MSR);
+#endif
+ avr_uart_configure();
+
+ local_irq_enable();
+}
+
+static int __init ls_uarts_init(void)
+{
+ struct device_node *avr;
+ phys_addr_t phys_addr;
+ int len;
+
+ avr = of_find_node_by_path("/soc10x/serial@80004500");
+ if (!avr)
+ return -EINVAL;
+
+ avr_clock = *(u32*)get_property(avr, "clock-frequency", &len);
+ phys_addr = ((u32*)get_property(avr, "reg", &len))[0];
+
+ if (!avr_clock || !phys_addr)
+ return -EINVAL;
+
+ avr_addr = ioremap(phys_addr, 32);
+ if (!avr_addr)
+ return -EFAULT;
+
+ ls_uart_init();
+
+ INIT_WORK(&wd_work, wd_stop, NULL);
+ schedule_work(&wd_work);
+
+ return 0;
+}
+
+late_initcall(ls_uarts_init);