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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/cris/arch-v32/mach-fs
Initial import
Diffstat (limited to 'arch/cris/arch-v32/mach-fs')
-rw-r--r--arch/cris/arch-v32/mach-fs/Kconfig216
-rw-r--r--arch/cris/arch-v32/mach-fs/Makefile8
-rw-r--r--arch/cris/arch-v32/mach-fs/arbiter.c404
-rw-r--r--arch/cris/arch-v32/mach-fs/dma.c229
-rw-r--r--arch/cris/arch-v32/mach-fs/dram_init.S116
-rw-r--r--arch/cris/arch-v32/mach-fs/hw_settings.S70
-rw-r--r--arch/cris/arch-v32/mach-fs/io.c191
-rw-r--r--arch/cris/arch-v32/mach-fs/pinmux.c323
8 files changed, 1557 insertions, 0 deletions
diff --git a/arch/cris/arch-v32/mach-fs/Kconfig b/arch/cris/arch-v32/mach-fs/Kconfig
new file mode 100644
index 000000000..774de82ab
--- /dev/null
+++ b/arch/cris/arch-v32/mach-fs/Kconfig
@@ -0,0 +1,216 @@
+if ETRAXFS
+
+menu "ETRAX FS options"
+ depends on ETRAXFS
+
+config ETRAX_DRAM_VIRTUAL_BASE
+ hex
+ depends on ETRAX_ARCH_V32
+ default "c0000000"
+
+config ETRAX_SERIAL_PORTS
+ int
+ default 4
+
+config ETRAX_MEM_GRP1_CONFIG
+ hex "MEM_GRP1_CONFIG"
+ depends on ETRAX_ARCH_V32
+ default "4044a"
+ help
+ Waitstates for flash. The default value is suitable for the
+ standard flashes used in axis products (120 ns).
+
+config ETRAX_MEM_GRP2_CONFIG
+ hex "MEM_GRP2_CONFIG"
+ depends on ETRAX_ARCH_V32
+ default "0"
+ help
+ Waitstates for SRAM. 0 is a good choice for most Axis products.
+
+config ETRAX_MEM_GRP3_CONFIG
+ hex "MEM_GRP3_CONFIG"
+ depends on ETRAX_ARCH_V32
+ default "0"
+ help
+ Waitstates for CSP0-3. 0 is a good choice for most Axis products.
+ It may need to be changed if external devices such as extra
+ register-mapped LEDs are used.
+
+config ETRAX_MEM_GRP4_CONFIG
+ hex "MEM_GRP4_CONFIG"
+ depends on ETRAX_ARCH_V32
+ default "0"
+ help
+ Waitstates for CSP4-6. 0 is a good choice for most Axis products.
+
+config ETRAX_SDRAM_GRP0_CONFIG
+ hex "SDRAM_GRP0_CONFIG"
+ depends on ETRAX_ARCH_V32
+ default "336"
+ help
+ SDRAM configuration for group 0. The value depends on the
+ hardware configuration. The default value is suitable
+ for 32 MB organized as two 16 bits chips (e.g. Axis
+ part number 18550) connected as one 32 bit device (i.e. in
+ the same group).
+
+config ETRAX_SDRAM_GRP1_CONFIG
+ hex "SDRAM_GRP1_CONFIG"
+ depends on ETRAX_ARCH_V32
+ default "0"
+ help
+ SDRAM configuration for group 1. The default value is 0
+ because group 1 is not used in the default configuration,
+ described in the help for SDRAM_GRP0_CONFIG.
+
+config ETRAX_SDRAM_TIMING
+ hex "SDRAM_TIMING"
+ depends on ETRAX_ARCH_V32
+ default "104a"
+ help
+ SDRAM timing parameters. The default value is ok for
+ most hardwares but large SDRAMs may require a faster
+ refresh (a.k.a 8K refresh). The default value implies
+ 100MHz clock and SDR mode.
+
+config ETRAX_SDRAM_COMMAND
+ hex "SDRAM_COMMAND"
+ depends on ETRAX_ARCH_V32
+ default "0"
+ help
+ SDRAM command. Should be 0 unless you really know what
+ you are doing (may be != 0 for unusual address line
+ mappings such as in a MCM)..
+
+config ETRAX_DEF_GIO_PA_OE
+ hex "GIO_PA_OE"
+ depends on ETRAX_ARCH_V32
+ default "1c"
+ help
+ Configures the direction of general port A bits. 1 is out, 0 is in.
+ This is often totally different depending on the product used.
+ There are some guidelines though - if you know that only LED's are
+ connected to port PA, then they are usually connected to bits 2-4
+ and you can therefore use 1c. On other boards which don't have the
+ LED's at the general ports, these bits are used for all kinds of
+ stuff. If you don't know what to use, it is always safe to put all
+ as inputs, although floating inputs isn't good.
+
+config ETRAX_DEF_GIO_PA_OUT
+ hex "GIO_PA_OUT"
+ depends on ETRAX_ARCH_V32
+ default "00"
+ help
+ Configures the initial data for the general port A bits. Most
+ products should use 00 here.
+
+config ETRAX_DEF_GIO_PB_OE
+ hex "GIO_PB_OE"
+ depends on ETRAX_ARCH_V32
+ default "00000"
+ help
+ Configures the direction of general port B bits. 1 is out, 0 is in.
+ This is often totally different depending on the product used.
+ There are some guidelines though - if you know that only LED's are
+ connected to port PA, then they are usually connected to bits 2-4
+ and you can therefore use 1c. On other boards which don't have the
+ LED's at the general ports, these bits are used for all kinds of
+ stuff. If you don't know what to use, it is always safe to put all
+ as inputs, although floating inputs isn't good.
+
+config ETRAX_DEF_GIO_PB_OUT
+ hex "GIO_PB_OUT"
+ depends on ETRAX_ARCH_V32
+ default "00000"
+ help
+ Configures the initial data for the general port B bits. Most
+ products should use 00000 here.
+
+config ETRAX_DEF_GIO_PC_OE
+ hex "GIO_PC_OE"
+ depends on ETRAX_ARCH_V32
+ default "00000"
+ help
+ Configures the direction of general port C bits. 1 is out, 0 is in.
+ This is often totally different depending on the product used.
+ There are some guidelines though - if you know that only LED's are
+ connected to port PA, then they are usually connected to bits 2-4
+ and you can therefore use 1c. On other boards which don't have the
+ LED's at the general ports, these bits are used for all kinds of
+ stuff. If you don't know what to use, it is always safe to put all
+ as inputs, although floating inputs isn't good.
+
+config ETRAX_DEF_GIO_PC_OUT
+ hex "GIO_PC_OUT"
+ depends on ETRAX_ARCH_V32
+ default "00000"
+ help
+ Configures the initial data for the general port C bits. Most
+ products should use 00000 here.
+
+config ETRAX_DEF_GIO_PD_OE
+ hex "GIO_PD_OE"
+ depends on ETRAX_ARCH_V32
+ default "00000"
+ help
+ Configures the direction of general port D bits. 1 is out, 0 is in.
+ This is often totally different depending on the product used.
+ There are some guidelines though - if you know that only LED's are
+ connected to port PA, then they are usually connected to bits 2-4
+ and you can therefore use 1c. On other boards which don't have the
+ LED's at the general ports, these bits are used for all kinds of
+ stuff. If you don't know what to use, it is always safe to put all
+ as inputs, although floating inputs isn't good.
+
+config ETRAX_DEF_GIO_PD_OUT
+ hex "GIO_PD_OUT"
+ depends on ETRAX_ARCH_V32
+ default "00000"
+ help
+ Configures the initial data for the general port D bits. Most
+ products should use 00000 here.
+
+config ETRAX_DEF_GIO_PE_OE
+ hex "GIO_PE_OE"
+ depends on ETRAX_ARCH_V32
+ default "00000"
+ help
+ Configures the direction of general port E bits. 1 is out, 0 is in.
+ This is often totally different depending on the product used.
+ There are some guidelines though - if you know that only LED's are
+ connected to port PA, then they are usually connected to bits 2-4
+ and you can therefore use 1c. On other boards which don't have the
+ LED's at the general ports, these bits are used for all kinds of
+ stuff. If you don't know what to use, it is always safe to put all
+ as inputs, although floating inputs isn't good.
+
+config ETRAX_DEF_GIO_PE_OUT
+ hex "GIO_PE_OUT"
+ depends on ETRAX_ARCH_V32
+ default "00000"
+ help
+ Configures the initial data for the general port E bits. Most
+ products should use 00000 here.
+
+config ETRAX_DEF_GIO_PV_OE
+ hex "GIO_PV_OE"
+ depends on ETRAX_VIRTUAL_GPIO
+ default "0000"
+ help
+ Configures the direction of virtual general port V bits. 1 is out,
+ 0 is in. This is often totally different depending on the product
+ used. These bits are used for all kinds of stuff. If you don't know
+ what to use, it is always safe to put all as inputs, although
+ floating inputs isn't good.
+
+config ETRAX_DEF_GIO_PV_OUT
+ hex "GIO_PV_OUT"
+ depends on ETRAX_VIRTUAL_GPIO
+ default "0000"
+ help
+ Configures the initial data for the virtual general port V bits.
+ Most products should use 0000 here.
+
+endmenu
+
+endif
diff --git a/arch/cris/arch-v32/mach-fs/Makefile b/arch/cris/arch-v32/mach-fs/Makefile
new file mode 100644
index 000000000..18a227196
--- /dev/null
+++ b/arch/cris/arch-v32/mach-fs/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the linux kernel.
+#
+
+obj-y := dma.o pinmux.o io.o arbiter.o
+
+clean:
+
diff --git a/arch/cris/arch-v32/mach-fs/arbiter.c b/arch/cris/arch-v32/mach-fs/arbiter.c
new file mode 100644
index 000000000..c97f4d812
--- /dev/null
+++ b/arch/cris/arch-v32/mach-fs/arbiter.c
@@ -0,0 +1,404 @@
+/*
+ * Memory arbiter functions. Allocates bandwidth through the
+ * arbiter and sets up arbiter breakpoints.
+ *
+ * The algorithm first assigns slots to the clients that has specified
+ * bandwidth (e.g. ethernet) and then the remaining slots are divided
+ * on all the active clients.
+ *
+ * Copyright (c) 2004-2007 Axis Communications AB.
+ */
+
+#include <hwregs/reg_map.h>
+#include <hwregs/reg_rdwr.h>
+#include <hwregs/marb_defs.h>
+#include <arbiter.h>
+#include <hwregs/intr_vect.h>
+#include <linux/interrupt.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <asm/irq_regs.h>
+
+struct crisv32_watch_entry {
+ unsigned long instance;
+ watch_callback *cb;
+ unsigned long start;
+ unsigned long end;
+ int used;
+};
+
+#define NUMBER_OF_BP 4
+#define NBR_OF_CLIENTS 14
+#define NBR_OF_SLOTS 64
+#define SDRAM_BANDWIDTH 100000000 /* Some kind of expected value */
+#define INTMEM_BANDWIDTH 400000000
+#define NBR_OF_REGIONS 2
+
+static struct crisv32_watch_entry watches[NUMBER_OF_BP] = {
+ {regi_marb_bp0},
+ {regi_marb_bp1},
+ {regi_marb_bp2},
+ {regi_marb_bp3}
+};
+
+static u8 requested_slots[NBR_OF_REGIONS][NBR_OF_CLIENTS];
+static u8 active_clients[NBR_OF_REGIONS][NBR_OF_CLIENTS];
+static int max_bandwidth[NBR_OF_REGIONS] =
+ { SDRAM_BANDWIDTH, INTMEM_BANDWIDTH };
+
+DEFINE_SPINLOCK(arbiter_lock);
+
+static irqreturn_t crisv32_arbiter_irq(int irq, void *dev_id);
+
+/*
+ * "I'm the arbiter, I know the score.
+ * From square one I'll be watching all 64."
+ * (memory arbiter slots, that is)
+ *
+ * Or in other words:
+ * Program the memory arbiter slots for "region" according to what's
+ * in requested_slots[] and active_clients[], while minimizing
+ * latency. A caller may pass a non-zero positive amount for
+ * "unused_slots", which must then be the unallocated, remaining
+ * number of slots, free to hand out to any client.
+ */
+
+static void crisv32_arbiter_config(int region, int unused_slots)
+{
+ int slot;
+ int client;
+ int interval = 0;
+
+ /*
+ * This vector corresponds to the hardware arbiter slots (see
+ * the hardware documentation for semantics). We initialize
+ * each slot with a suitable sentinel value outside the valid
+ * range {0 .. NBR_OF_CLIENTS - 1} and replace them with
+ * client indexes. Then it's fed to the hardware.
+ */
+ s8 val[NBR_OF_SLOTS];
+
+ for (slot = 0; slot < NBR_OF_SLOTS; slot++)
+ val[slot] = -1;
+
+ for (client = 0; client < NBR_OF_CLIENTS; client++) {
+ int pos;
+ /* Allocate the requested non-zero number of slots, but
+ * also give clients with zero-requests one slot each
+ * while stocks last. We do the latter here, in client
+ * order. This makes sure zero-request clients are the
+ * first to get to any spare slots, else those slots
+ * could, when bandwidth is allocated close to the limit,
+ * all be allocated to low-index non-zero-request clients
+ * in the default-fill loop below. Another positive but
+ * secondary effect is a somewhat better spread of the
+ * zero-bandwidth clients in the vector, avoiding some of
+ * the latency that could otherwise be caused by the
+ * partitioning of non-zero-bandwidth clients at low
+ * indexes and zero-bandwidth clients at high
+ * indexes. (Note that this spreading can only affect the
+ * unallocated bandwidth.) All the above only matters for
+ * memory-intensive situations, of course.
+ */
+ if (!requested_slots[region][client]) {
+ /*
+ * Skip inactive clients. Also skip zero-slot
+ * allocations in this pass when there are no known
+ * free slots.
+ */
+ if (!active_clients[region][client]
+ || unused_slots <= 0)
+ continue;
+
+ unused_slots--;
+
+ /* Only allocate one slot for this client. */
+ interval = NBR_OF_SLOTS;
+ } else
+ interval =
+ NBR_OF_SLOTS / requested_slots[region][client];
+
+ pos = 0;
+ while (pos < NBR_OF_SLOTS) {
+ if (val[pos] >= 0)
+ pos++;
+ else {
+ val[pos] = client;
+ pos += interval;
+ }
+ }
+ }
+
+ client = 0;
+ for (slot = 0; slot < NBR_OF_SLOTS; slot++) {
+ /*
+ * Allocate remaining slots in round-robin
+ * client-number order for active clients. For this
+ * pass, we ignore requested bandwidth and previous
+ * allocations.
+ */
+ if (val[slot] < 0) {
+ int first = client;
+ while (!active_clients[region][client]) {
+ client = (client + 1) % NBR_OF_CLIENTS;
+ if (client == first)
+ break;
+ }
+ val[slot] = client;
+ client = (client + 1) % NBR_OF_CLIENTS;
+ }
+ if (region == EXT_REGION)
+ REG_WR_INT_VECT(marb, regi_marb, rw_ext_slots, slot,
+ val[slot]);
+ else if (region == INT_REGION)
+ REG_WR_INT_VECT(marb, regi_marb, rw_int_slots, slot,
+ val[slot]);
+ }
+}
+
+extern char _stext, _etext;
+
+static void crisv32_arbiter_init(void)
+{
+ static int initialized;
+
+ if (initialized)
+ return;
+
+ initialized = 1;
+
+ /*
+ * CPU caches are always set to active, but with zero
+ * bandwidth allocated. It should be ok to allocate zero
+ * bandwidth for the caches, because DMA for other channels
+ * will supposedly finish, once their programmed amount is
+ * done, and then the caches will get access according to the
+ * "fixed scheme" for unclaimed slots. Though, if for some
+ * use-case somewhere, there's a maximum CPU latency for
+ * e.g. some interrupt, we have to start allocating specific
+ * bandwidth for the CPU caches too.
+ */
+ active_clients[EXT_REGION][10] = active_clients[EXT_REGION][11] = 1;
+ crisv32_arbiter_config(EXT_REGION, 0);
+ crisv32_arbiter_config(INT_REGION, 0);
+
+ if (request_irq(MEMARB_INTR_VECT, crisv32_arbiter_irq, 0,
+ "arbiter", NULL))
+ printk(KERN_ERR "Couldn't allocate arbiter IRQ\n");
+
+#ifndef CONFIG_ETRAX_KGDB
+ /* Global watch for writes to kernel text segment. */
+ crisv32_arbiter_watch(virt_to_phys(&_stext), &_etext - &_stext,
+ arbiter_all_clients, arbiter_all_write, NULL);
+#endif
+}
+
+/* Main entry for bandwidth allocation. */
+
+int crisv32_arbiter_allocate_bandwidth(int client, int region,
+ unsigned long bandwidth)
+{
+ int i;
+ int total_assigned = 0;
+ int total_clients = 0;
+ int req;
+
+ crisv32_arbiter_init();
+
+ for (i = 0; i < NBR_OF_CLIENTS; i++) {
+ total_assigned += requested_slots[region][i];
+ total_clients += active_clients[region][i];
+ }
+
+ /* Avoid division by 0 for 0-bandwidth requests. */
+ req = bandwidth == 0
+ ? 0 : NBR_OF_SLOTS / (max_bandwidth[region] / bandwidth);
+
+ /*
+ * We make sure that there are enough slots only for non-zero
+ * requests. Requesting 0 bandwidth *may* allocate slots,
+ * though if all bandwidth is allocated, such a client won't
+ * get any and will have to rely on getting memory access
+ * according to the fixed scheme that's the default when one
+ * of the slot-allocated clients doesn't claim their slot.
+ */
+ if (total_assigned + req > NBR_OF_SLOTS)
+ return -ENOMEM;
+
+ active_clients[region][client] = 1;
+ requested_slots[region][client] = req;
+ crisv32_arbiter_config(region, NBR_OF_SLOTS - total_assigned);
+
+ return 0;
+}
+
+/*
+ * Main entry for bandwidth deallocation.
+ *
+ * Strictly speaking, for a somewhat constant set of clients where
+ * each client gets a constant bandwidth and is just enabled or
+ * disabled (somewhat dynamically), no action is necessary here to
+ * avoid starvation for non-zero-allocation clients, as the allocated
+ * slots will just be unused. However, handing out those unused slots
+ * to active clients avoids needless latency if the "fixed scheme"
+ * would give unclaimed slots to an eager low-index client.
+ */
+
+void crisv32_arbiter_deallocate_bandwidth(int client, int region)
+{
+ int i;
+ int total_assigned = 0;
+
+ requested_slots[region][client] = 0;
+ active_clients[region][client] = 0;
+
+ for (i = 0; i < NBR_OF_CLIENTS; i++)
+ total_assigned += requested_slots[region][i];
+
+ crisv32_arbiter_config(region, NBR_OF_SLOTS - total_assigned);
+}
+
+int crisv32_arbiter_watch(unsigned long start, unsigned long size,
+ unsigned long clients, unsigned long accesses,
+ watch_callback *cb)
+{
+ int i;
+
+ crisv32_arbiter_init();
+
+ if (start > 0x80000000) {
+ printk(KERN_ERR "Arbiter: %lX doesn't look like a "
+ "physical address", start);
+ return -EFAULT;
+ }
+
+ spin_lock(&arbiter_lock);
+
+ for (i = 0; i < NUMBER_OF_BP; i++) {
+ if (!watches[i].used) {
+ reg_marb_rw_intr_mask intr_mask =
+ REG_RD(marb, regi_marb, rw_intr_mask);
+
+ watches[i].used = 1;
+ watches[i].start = start;
+ watches[i].end = start + size;
+ watches[i].cb = cb;
+
+ REG_WR_INT(marb_bp, watches[i].instance, rw_first_addr,
+ watches[i].start);
+ REG_WR_INT(marb_bp, watches[i].instance, rw_last_addr,
+ watches[i].end);
+ REG_WR_INT(marb_bp, watches[i].instance, rw_op,
+ accesses);
+ REG_WR_INT(marb_bp, watches[i].instance, rw_clients,
+ clients);
+
+ if (i == 0)
+ intr_mask.bp0 = regk_marb_yes;
+ else if (i == 1)
+ intr_mask.bp1 = regk_marb_yes;
+ else if (i == 2)
+ intr_mask.bp2 = regk_marb_yes;
+ else if (i == 3)
+ intr_mask.bp3 = regk_marb_yes;
+
+ REG_WR(marb, regi_marb, rw_intr_mask, intr_mask);
+ spin_unlock(&arbiter_lock);
+
+ return i;
+ }
+ }
+ spin_unlock(&arbiter_lock);
+ return -ENOMEM;
+}
+
+int crisv32_arbiter_unwatch(int id)
+{
+ reg_marb_rw_intr_mask intr_mask = REG_RD(marb, regi_marb, rw_intr_mask);
+
+ crisv32_arbiter_init();
+
+ spin_lock(&arbiter_lock);
+
+ if ((id < 0) || (id >= NUMBER_OF_BP) || (!watches[id].used)) {
+ spin_unlock(&arbiter_lock);
+ return -EINVAL;
+ }
+
+ memset(&watches[id], 0, sizeof(struct crisv32_watch_entry));
+
+ if (id == 0)
+ intr_mask.bp0 = regk_marb_no;
+ else if (id == 1)
+ intr_mask.bp1 = regk_marb_no;
+ else if (id == 2)
+ intr_mask.bp2 = regk_marb_no;
+ else if (id == 3)
+ intr_mask.bp3 = regk_marb_no;
+
+ REG_WR(marb, regi_marb, rw_intr_mask, intr_mask);
+
+ spin_unlock(&arbiter_lock);
+ return 0;
+}
+
+extern void show_registers(struct pt_regs *regs);
+
+static irqreturn_t crisv32_arbiter_irq(int irq, void *dev_id)
+{
+ reg_marb_r_masked_intr masked_intr =
+ REG_RD(marb, regi_marb, r_masked_intr);
+ reg_marb_bp_r_brk_clients r_clients;
+ reg_marb_bp_r_brk_addr r_addr;
+ reg_marb_bp_r_brk_op r_op;
+ reg_marb_bp_r_brk_first_client r_first;
+ reg_marb_bp_r_brk_size r_size;
+ reg_marb_bp_rw_ack ack = { 0 };
+ reg_marb_rw_ack_intr ack_intr = {
+ .bp0 = 1, .bp1 = 1, .bp2 = 1, .bp3 = 1
+ };
+ struct crisv32_watch_entry *watch;
+
+ if (masked_intr.bp0) {
+ watch = &watches[0];
+ ack_intr.bp0 = regk_marb_yes;
+ } else if (masked_intr.bp1) {
+ watch = &watches[1];
+ ack_intr.bp1 = regk_marb_yes;
+ } else if (masked_intr.bp2) {
+ watch = &watches[2];
+ ack_intr.bp2 = regk_marb_yes;
+ } else if (masked_intr.bp3) {
+ watch = &watches[3];
+ ack_intr.bp3 = regk_marb_yes;
+ } else {
+ return IRQ_NONE;
+ }
+
+ /* Retrieve all useful information and print it. */
+ r_clients = REG_RD(marb_bp, watch->instance, r_brk_clients);
+ r_addr = REG_RD(marb_bp, watch->instance, r_brk_addr);
+ r_op = REG_RD(marb_bp, watch->instance, r_brk_op);
+ r_first = REG_RD(marb_bp, watch->instance, r_brk_first_client);
+ r_size = REG_RD(marb_bp, watch->instance, r_brk_size);
+
+ printk(KERN_INFO "Arbiter IRQ\n");
+ printk(KERN_INFO "Clients %X addr %X op %X first %X size %X\n",
+ REG_TYPE_CONV(int, reg_marb_bp_r_brk_clients, r_clients),
+ REG_TYPE_CONV(int, reg_marb_bp_r_brk_addr, r_addr),
+ REG_TYPE_CONV(int, reg_marb_bp_r_brk_op, r_op),
+ REG_TYPE_CONV(int, reg_marb_bp_r_brk_first_client, r_first),
+ REG_TYPE_CONV(int, reg_marb_bp_r_brk_size, r_size));
+
+ REG_WR(marb_bp, watch->instance, rw_ack, ack);
+ REG_WR(marb, regi_marb, rw_ack_intr, ack_intr);
+
+ printk(KERN_INFO "IRQ occurred at %lX\n", get_irq_regs()->erp);
+
+ if (watch->cb)
+ watch->cb();
+
+ return IRQ_HANDLED;
+}
diff --git a/arch/cris/arch-v32/mach-fs/dma.c b/arch/cris/arch-v32/mach-fs/dma.c
new file mode 100644
index 000000000..fc6416a67
--- /dev/null
+++ b/arch/cris/arch-v32/mach-fs/dma.c
@@ -0,0 +1,229 @@
+/* Wrapper for DMA channel allocator that starts clocks etc */
+
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <asm/dma.h>
+#include <hwregs/reg_map.h>
+#include <hwregs/reg_rdwr.h>
+#include <hwregs/marb_defs.h>
+#include <hwregs/config_defs.h>
+#include <hwregs/strmux_defs.h>
+#include <linux/errno.h>
+#include <mach/arbiter.h>
+
+static char used_dma_channels[MAX_DMA_CHANNELS];
+static const char *used_dma_channels_users[MAX_DMA_CHANNELS];
+
+static DEFINE_SPINLOCK(dma_lock);
+
+int crisv32_request_dma(unsigned int dmanr, const char *device_id,
+ unsigned options, unsigned int bandwidth,
+ enum dma_owner owner)
+{
+ unsigned long flags;
+ reg_config_rw_clk_ctrl clk_ctrl;
+ reg_strmux_rw_cfg strmux_cfg;
+
+ if (crisv32_arbiter_allocate_bandwidth(dmanr,
+ options & DMA_INT_MEM ?
+ INT_REGION : EXT_REGION,
+ bandwidth))
+ return -ENOMEM;
+
+ spin_lock_irqsave(&dma_lock, flags);
+
+ if (used_dma_channels[dmanr]) {
+ spin_unlock_irqrestore(&dma_lock, flags);
+ if (options & DMA_VERBOSE_ON_ERROR) {
+ printk(KERN_ERR "Failed to request DMA %i for %s, "
+ "already allocated by %s\n",
+ dmanr,
+ device_id,
+ used_dma_channels_users[dmanr]);
+ }
+ if (options & DMA_PANIC_ON_ERROR)
+ panic("request_dma error!");
+ spin_unlock_irqrestore(&dma_lock, flags);
+ return -EBUSY;
+ }
+ clk_ctrl = REG_RD(config, regi_config, rw_clk_ctrl);
+ strmux_cfg = REG_RD(strmux, regi_strmux, rw_cfg);
+
+ switch (dmanr) {
+ case 0:
+ case 1:
+ clk_ctrl.dma01_eth0 = 1;
+ break;
+ case 2:
+ case 3:
+ clk_ctrl.dma23 = 1;
+ break;
+ case 4:
+ case 5:
+ clk_ctrl.dma45 = 1;
+ break;
+ case 6:
+ case 7:
+ clk_ctrl.dma67 = 1;
+ break;
+ case 8:
+ case 9:
+ clk_ctrl.dma89_strcop = 1;
+ break;
+#if MAX_DMA_CHANNELS-1 != 9
+#error Check dma.c
+#endif
+ default:
+ spin_unlock_irqrestore(&dma_lock, flags);
+ if (options & DMA_VERBOSE_ON_ERROR) {
+ printk(KERN_ERR "Failed to request DMA %i for %s, "
+ "only 0-%i valid)\n",
+ dmanr, device_id, MAX_DMA_CHANNELS - 1);
+ }
+
+ if (options & DMA_PANIC_ON_ERROR)
+ panic("request_dma error!");
+ return -EINVAL;
+ }
+
+ switch (owner) {
+ case dma_eth0:
+ if (dmanr == 0)
+ strmux_cfg.dma0 = regk_strmux_eth0;
+ else if (dmanr == 1)
+ strmux_cfg.dma1 = regk_strmux_eth0;
+ else
+ panic("Invalid DMA channel for eth0\n");
+ break;
+ case dma_eth1:
+ if (dmanr == 6)
+ strmux_cfg.dma6 = regk_strmux_eth1;
+ else if (dmanr == 7)
+ strmux_cfg.dma7 = regk_strmux_eth1;
+ else
+ panic("Invalid DMA channel for eth1\n");
+ break;
+ case dma_iop0:
+ if (dmanr == 2)
+ strmux_cfg.dma2 = regk_strmux_iop0;
+ else if (dmanr == 3)
+ strmux_cfg.dma3 = regk_strmux_iop0;
+ else
+ panic("Invalid DMA channel for iop0\n");
+ break;
+ case dma_iop1:
+ if (dmanr == 4)
+ strmux_cfg.dma4 = regk_strmux_iop1;
+ else if (dmanr == 5)
+ strmux_cfg.dma5 = regk_strmux_iop1;
+ else
+ panic("Invalid DMA channel for iop1\n");
+ break;
+ case dma_ser0:
+ if (dmanr == 6)
+ strmux_cfg.dma6 = regk_strmux_ser0;
+ else if (dmanr == 7)
+ strmux_cfg.dma7 = regk_strmux_ser0;
+ else
+ panic("Invalid DMA channel for ser0\n");
+ break;
+ case dma_ser1:
+ if (dmanr == 4)
+ strmux_cfg.dma4 = regk_strmux_ser1;
+ else if (dmanr == 5)
+ strmux_cfg.dma5 = regk_strmux_ser1;
+ else
+ panic("Invalid DMA channel for ser1\n");
+ break;
+ case dma_ser2:
+ if (dmanr == 2)
+ strmux_cfg.dma2 = regk_strmux_ser2;
+ else if (dmanr == 3)
+ strmux_cfg.dma3 = regk_strmux_ser2;
+ else
+ panic("Invalid DMA channel for ser2\n");
+ break;
+ case dma_ser3:
+ if (dmanr == 8)
+ strmux_cfg.dma8 = regk_strmux_ser3;
+ else if (dmanr == 9)
+ strmux_cfg.dma9 = regk_strmux_ser3;
+ else
+ panic("Invalid DMA channel for ser3\n");
+ break;
+ case dma_sser0:
+ if (dmanr == 4)
+ strmux_cfg.dma4 = regk_strmux_sser0;
+ else if (dmanr == 5)
+ strmux_cfg.dma5 = regk_strmux_sser0;
+ else
+ panic("Invalid DMA channel for sser0\n");
+ break;
+ case dma_sser1:
+ if (dmanr == 6)
+ strmux_cfg.dma6 = regk_strmux_sser1;
+ else if (dmanr == 7)
+ strmux_cfg.dma7 = regk_strmux_sser1;
+ else
+ panic("Invalid DMA channel for sser1\n");
+ break;
+ case dma_ata:
+ if (dmanr == 2)
+ strmux_cfg.dma2 = regk_strmux_ata;
+ else if (dmanr == 3)
+ strmux_cfg.dma3 = regk_strmux_ata;
+ else
+ panic("Invalid DMA channel for ata\n");
+ break;
+ case dma_strp:
+ if (dmanr == 8)
+ strmux_cfg.dma8 = regk_strmux_strcop;
+ else if (dmanr == 9)
+ strmux_cfg.dma9 = regk_strmux_strcop;
+ else
+ panic("Invalid DMA channel for strp\n");
+ break;
+ case dma_ext0:
+ if (dmanr == 6)
+ strmux_cfg.dma6 = regk_strmux_ext0;
+ else
+ panic("Invalid DMA channel for ext0\n");
+ break;
+ case dma_ext1:
+ if (dmanr == 7)
+ strmux_cfg.dma7 = regk_strmux_ext1;
+ else
+ panic("Invalid DMA channel for ext1\n");
+ break;
+ case dma_ext2:
+ if (dmanr == 2)
+ strmux_cfg.dma2 = regk_strmux_ext2;
+ else if (dmanr == 8)
+ strmux_cfg.dma8 = regk_strmux_ext2;
+ else
+ panic("Invalid DMA channel for ext2\n");
+ break;
+ case dma_ext3:
+ if (dmanr == 3)
+ strmux_cfg.dma3 = regk_strmux_ext3;
+ else if (dmanr == 9)
+ strmux_cfg.dma9 = regk_strmux_ext2;
+ else
+ panic("Invalid DMA channel for ext2\n");
+ break;
+ }
+
+ used_dma_channels[dmanr] = 1;
+ used_dma_channels_users[dmanr] = device_id;
+ REG_WR(config, regi_config, rw_clk_ctrl, clk_ctrl);
+ REG_WR(strmux, regi_strmux, rw_cfg, strmux_cfg);
+ spin_unlock_irqrestore(&dma_lock, flags);
+ return 0;
+}
+
+void crisv32_free_dma(unsigned int dmanr)
+{
+ spin_lock(&dma_lock);
+ used_dma_channels[dmanr] = 0;
+ spin_unlock(&dma_lock);
+}
diff --git a/arch/cris/arch-v32/mach-fs/dram_init.S b/arch/cris/arch-v32/mach-fs/dram_init.S
new file mode 100644
index 000000000..6fbad3365
--- /dev/null
+++ b/arch/cris/arch-v32/mach-fs/dram_init.S
@@ -0,0 +1,116 @@
+/*
+ * DRAM/SDRAM initialization - alter with care
+ * This file is intended to be included from other assembler files
+ *
+ * Note: This file may not modify r8 or r9 because they are used to
+ * carry information from the decompresser to the kernel
+ *
+ * Copyright (C) 2000-2007 Axis Communications AB
+ *
+ * Authors: Mikael Starvik <starvik@axis.com>
+ */
+
+/* Just to be certain the config file is included, we include it here
+ * explicitely instead of depending on it being included in the file that
+ * uses this code.
+ */
+
+#include <hwregs/asm/reg_map_asm.h>
+#include <hwregs/asm/bif_core_defs_asm.h>
+
+ ;; WARNING! The registers r8 and r9 are used as parameters carrying
+ ;; information from the decompressor (if the kernel was compressed).
+ ;; They should not be used in the code below.
+
+ ; Refer to BIF MDS for a description of SDRAM initialization
+
+ ; Bank configuration
+ move.d REG_ADDR(bif_core, regi_bif_core, rw_sdram_cfg_grp0), $r0
+ move.d CONFIG_ETRAX_SDRAM_GRP0_CONFIG, $r1
+ move.d $r1, [$r0]
+ move.d REG_ADDR(bif_core, regi_bif_core, rw_sdram_cfg_grp1), $r0
+ move.d CONFIG_ETRAX_SDRAM_GRP1_CONFIG, $r1
+ move.d $r1, [$r0]
+
+ ; Calculate value of mrs_data
+ ; CAS latency = 2 && bus_width = 32 => 0x40
+ ; CAS latency = 3 && bus_width = 32 => 0x60
+ ; CAS latency = 2 && bus_width = 16 => 0x20
+ ; CAS latency = 3 && bus_width = 16 => 0x30
+
+ ; Check if value is already supplied in kernel config
+ move.d CONFIG_ETRAX_SDRAM_COMMAND, $r2
+ bne _set_timing
+ nop
+
+ move.d 0x40, $r4 ; Assume 32 bits and CAS latency = 2
+ move.d CONFIG_ETRAX_SDRAM_TIMING, $r1
+ and.d 0x07, $r1 ; Get CAS latency
+ cmpq 2, $r1 ; CL = 2 ?
+ beq _bw_check
+ nop
+ move.d 0x60, $r4
+
+_bw_check:
+ ; Assume that group 0 width is equal to group 1. This assumption
+ ; is wrong for a group 1 only hardware (such as the grand old
+ ; StorPoint+).
+ move.d CONFIG_ETRAX_SDRAM_GRP0_CONFIG, $r1
+ and.d 0x200, $r1 ; DRAM width is bit 9
+ beq _set_timing
+ lslq 2, $r4 ; mrs_data starts at bit 2
+ lsrq 1, $r4 ; 16 bits. Shift down value.
+
+ ; Set timing parameters (refresh off to avoid Guinness TR 83)
+_set_timing:
+ move.d CONFIG_ETRAX_SDRAM_TIMING, $r1
+ and.d ~(3 << reg_bif_core_rw_sdram_timing___ref___lsb), $r1
+ move.d REG_ADDR(bif_core, regi_bif_core, rw_sdram_timing), $r0
+ move.d $r1, [$r0]
+
+ ; Issue NOP command
+ move.d REG_ADDR(bif_core, regi_bif_core, rw_sdram_cmd), $r5
+ moveq regk_bif_core_nop, $r1
+ move.d $r1, [$r5]
+
+ ; Wait 200us
+ move.d 10000, $r2
+1: bne 1b
+ subq 1, $r2
+
+ ; Issue initialization command sequence
+ lapc _sdram_commands_start, $r2
+ lapc _sdram_commands_end, $r3
+1: clear.d $r6
+ move.b [$r2+], $r6 ; Load command
+ or.d $r4, $r6 ; Add calculated mrs
+ move.d $r6, [$r5] ; Write rw_sdram_cmd
+ ; Wait 80 ns between each command
+ move.d 4000, $r7
+2: bne 2b
+ subq 1, $r7
+ cmp.d $r2, $r3 ; Last command?
+ bne 1b
+ nop
+
+ ; Start refresh
+ move.d CONFIG_ETRAX_SDRAM_TIMING, $r1
+ move.d REG_ADDR(bif_core, regi_bif_core, rw_sdram_timing), $r0
+ move.d $r1, [$r0]
+
+ ; Initialization finished
+ ba _sdram_commands_end
+ nop
+
+_sdram_commands_start:
+ .byte regk_bif_core_pre ; Precharge
+ .byte regk_bif_core_ref ; refresh
+ .byte regk_bif_core_ref ; refresh
+ .byte regk_bif_core_ref ; refresh
+ .byte regk_bif_core_ref ; refresh
+ .byte regk_bif_core_ref ; refresh
+ .byte regk_bif_core_ref ; refresh
+ .byte regk_bif_core_ref ; refresh
+ .byte regk_bif_core_ref ; refresh
+ .byte regk_bif_core_mrs ; mrs
+_sdram_commands_end:
diff --git a/arch/cris/arch-v32/mach-fs/hw_settings.S b/arch/cris/arch-v32/mach-fs/hw_settings.S
new file mode 100644
index 000000000..8bde93c36
--- /dev/null
+++ b/arch/cris/arch-v32/mach-fs/hw_settings.S
@@ -0,0 +1,70 @@
+/*
+ * This table is used by some tools to extract hardware parameters.
+ * The table should be included in the kernel and the decompressor.
+ * Don't forget to update the tools if you change this table.
+ *
+ * Copyright (C) 2001-2007 Axis Communications AB
+ *
+ * Authors: Mikael Starvik <starvik@axis.com>
+ */
+
+#include <hwregs/asm/reg_map_asm.h>
+#include <hwregs/asm/bif_core_defs_asm.h>
+#include <hwregs/asm/gio_defs_asm.h>
+
+ .ascii "HW_PARAM_MAGIC" ; Magic number
+ .dword 0xc0004000 ; Kernel start address
+
+ ; Debug port
+#ifdef CONFIG_ETRAX_DEBUG_PORT0
+ .dword 0
+#elif defined(CONFIG_ETRAX_DEBUG_PORT1)
+ .dword 1
+#elif defined(CONFIG_ETRAX_DEBUG_PORT2)
+ .dword 2
+#elif defined(CONFIG_ETRAX_DEBUG_PORT3)
+ .dword 3
+#else
+ .dword 4 ; No debug
+#endif
+
+ ; Register values
+ .dword REG_ADDR(bif_core, regi_bif_core, rw_grp1_cfg)
+ .dword CONFIG_ETRAX_MEM_GRP1_CONFIG
+ .dword REG_ADDR(bif_core, regi_bif_core, rw_grp2_cfg)
+ .dword CONFIG_ETRAX_MEM_GRP2_CONFIG
+ .dword REG_ADDR(bif_core, regi_bif_core, rw_grp3_cfg)
+ .dword CONFIG_ETRAX_MEM_GRP3_CONFIG
+ .dword REG_ADDR(bif_core, regi_bif_core, rw_grp4_cfg)
+ .dword CONFIG_ETRAX_MEM_GRP4_CONFIG
+ .dword REG_ADDR(bif_core, regi_bif_core, rw_sdram_cfg_grp0)
+ .dword CONFIG_ETRAX_SDRAM_GRP0_CONFIG
+ .dword REG_ADDR(bif_core, regi_bif_core, rw_sdram_cfg_grp1)
+ .dword CONFIG_ETRAX_SDRAM_GRP1_CONFIG
+ .dword REG_ADDR(bif_core, regi_bif_core, rw_sdram_timing)
+ .dword CONFIG_ETRAX_SDRAM_TIMING
+ .dword REG_ADDR(bif_core, regi_bif_core, rw_sdram_cmd)
+ .dword CONFIG_ETRAX_SDRAM_COMMAND
+
+ .dword REG_ADDR(gio, regi_gio, rw_pa_dout)
+ .dword CONFIG_ETRAX_DEF_GIO_PA_OUT
+ .dword REG_ADDR(gio, regi_gio, rw_pa_oe)
+ .dword CONFIG_ETRAX_DEF_GIO_PA_OE
+ .dword REG_ADDR(gio, regi_gio, rw_pb_dout)
+ .dword CONFIG_ETRAX_DEF_GIO_PB_OUT
+ .dword REG_ADDR(gio, regi_gio, rw_pb_oe)
+ .dword CONFIG_ETRAX_DEF_GIO_PB_OE
+ .dword REG_ADDR(gio, regi_gio, rw_pc_dout)
+ .dword CONFIG_ETRAX_DEF_GIO_PC_OUT
+ .dword REG_ADDR(gio, regi_gio, rw_pc_oe)
+ .dword CONFIG_ETRAX_DEF_GIO_PC_OE
+ .dword REG_ADDR(gio, regi_gio, rw_pd_dout)
+ .dword CONFIG_ETRAX_DEF_GIO_PD_OUT
+ .dword REG_ADDR(gio, regi_gio, rw_pd_oe)
+ .dword CONFIG_ETRAX_DEF_GIO_PD_OE
+ .dword REG_ADDR(gio, regi_gio, rw_pe_dout)
+ .dword CONFIG_ETRAX_DEF_GIO_PE_OUT
+ .dword REG_ADDR(gio, regi_gio, rw_pe_oe)
+ .dword CONFIG_ETRAX_DEF_GIO_PE_OE
+
+ .dword 0 ; No more register values
diff --git a/arch/cris/arch-v32/mach-fs/io.c b/arch/cris/arch-v32/mach-fs/io.c
new file mode 100644
index 000000000..a6958661f
--- /dev/null
+++ b/arch/cris/arch-v32/mach-fs/io.c
@@ -0,0 +1,191 @@
+/*
+ * Helper functions for I/O pins.
+ *
+ * Copyright (c) 2004-2007 Axis Communications AB.
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <asm/io.h>
+#include <mach/pinmux.h>
+#include <hwregs/gio_defs.h>
+
+#ifndef DEBUG
+#define DEBUG(x)
+#endif
+
+struct crisv32_ioport crisv32_ioports[] = {
+ {
+ (unsigned long *)REG_ADDR(gio, regi_gio, rw_pa_oe),
+ (unsigned long *)REG_ADDR(gio, regi_gio, rw_pa_dout),
+ (unsigned long *)REG_ADDR(gio, regi_gio, r_pa_din),
+ 8
+ },
+ {
+ (unsigned long *)REG_ADDR(gio, regi_gio, rw_pb_oe),
+ (unsigned long *)REG_ADDR(gio, regi_gio, rw_pb_dout),
+ (unsigned long *)REG_ADDR(gio, regi_gio, r_pb_din),
+ 18
+ },
+ {
+ (unsigned long *)REG_ADDR(gio, regi_gio, rw_pc_oe),
+ (unsigned long *)REG_ADDR(gio, regi_gio, rw_pc_dout),
+ (unsigned long *)REG_ADDR(gio, regi_gio, r_pc_din),
+ 18
+ },
+ {
+ (unsigned long *)REG_ADDR(gio, regi_gio, rw_pd_oe),
+ (unsigned long *)REG_ADDR(gio, regi_gio, rw_pd_dout),
+ (unsigned long *)REG_ADDR(gio, regi_gio, r_pd_din),
+ 18
+ },
+ {
+ (unsigned long *)REG_ADDR(gio, regi_gio, rw_pe_oe),
+ (unsigned long *)REG_ADDR(gio, regi_gio, rw_pe_dout),
+ (unsigned long *)REG_ADDR(gio, regi_gio, r_pe_din),
+ 18
+ }
+};
+
+#define NBR_OF_PORTS ARRAY_SIZE(crisv32_ioports)
+
+struct crisv32_iopin crisv32_led_net0_green;
+struct crisv32_iopin crisv32_led_net0_red;
+struct crisv32_iopin crisv32_led_net1_green;
+struct crisv32_iopin crisv32_led_net1_red;
+struct crisv32_iopin crisv32_led2_green;
+struct crisv32_iopin crisv32_led2_red;
+struct crisv32_iopin crisv32_led3_green;
+struct crisv32_iopin crisv32_led3_red;
+
+/* Dummy port used when green LED and red LED is on the same bit */
+static unsigned long io_dummy;
+static struct crisv32_ioport dummy_port = {
+ &io_dummy,
+ &io_dummy,
+ &io_dummy,
+ 18
+};
+static struct crisv32_iopin dummy_led = {
+ &dummy_port,
+ 0
+};
+
+static int __init crisv32_io_init(void)
+{
+ int ret = 0;
+
+ u32 i;
+
+ /* Locks *should* be dynamically initialized. */
+ for (i = 0; i < ARRAY_SIZE(crisv32_ioports); i++)
+ spin_lock_init(&crisv32_ioports[i].lock);
+ spin_lock_init(&dummy_port.lock);
+
+ /* Initialize LEDs */
+#if (defined(CONFIG_ETRAX_NBR_LED_GRP_ONE) || defined(CONFIG_ETRAX_NBR_LED_GRP_TWO))
+ ret +=
+ crisv32_io_get_name(&crisv32_led_net0_green,
+ CONFIG_ETRAX_LED_G_NET0);
+ crisv32_io_set_dir(&crisv32_led_net0_green, crisv32_io_dir_out);
+ if (strcmp(CONFIG_ETRAX_LED_G_NET0, CONFIG_ETRAX_LED_R_NET0)) {
+ ret +=
+ crisv32_io_get_name(&crisv32_led_net0_red,
+ CONFIG_ETRAX_LED_R_NET0);
+ crisv32_io_set_dir(&crisv32_led_net0_red, crisv32_io_dir_out);
+ } else
+ crisv32_led_net0_red = dummy_led;
+#endif
+
+#ifdef CONFIG_ETRAX_NBR_LED_GRP_TWO
+ ret +=
+ crisv32_io_get_name(&crisv32_led_net1_green,
+ CONFIG_ETRAX_LED_G_NET1);
+ crisv32_io_set_dir(&crisv32_led_net1_green, crisv32_io_dir_out);
+ if (strcmp(CONFIG_ETRAX_LED_G_NET1, CONFIG_ETRAX_LED_R_NET1)) {
+ crisv32_io_get_name(&crisv32_led_net1_red,
+ CONFIG_ETRAX_LED_R_NET1);
+ crisv32_io_set_dir(&crisv32_led_net1_red, crisv32_io_dir_out);
+ } else
+ crisv32_led_net1_red = dummy_led;
+#endif
+
+ ret += crisv32_io_get_name(&crisv32_led2_green, CONFIG_ETRAX_V32_LED2G);
+ ret += crisv32_io_get_name(&crisv32_led2_red, CONFIG_ETRAX_V32_LED2R);
+ ret += crisv32_io_get_name(&crisv32_led3_green, CONFIG_ETRAX_V32_LED3G);
+ ret += crisv32_io_get_name(&crisv32_led3_red, CONFIG_ETRAX_V32_LED3R);
+
+ crisv32_io_set_dir(&crisv32_led2_green, crisv32_io_dir_out);
+ crisv32_io_set_dir(&crisv32_led2_red, crisv32_io_dir_out);
+ crisv32_io_set_dir(&crisv32_led3_green, crisv32_io_dir_out);
+ crisv32_io_set_dir(&crisv32_led3_red, crisv32_io_dir_out);
+
+ return ret;
+}
+
+__initcall(crisv32_io_init);
+
+int crisv32_io_get(struct crisv32_iopin *iopin,
+ unsigned int port, unsigned int pin)
+{
+ if (port > NBR_OF_PORTS)
+ return -EINVAL;
+ if (port > crisv32_ioports[port].pin_count)
+ return -EINVAL;
+
+ iopin->bit = 1 << pin;
+ iopin->port = &crisv32_ioports[port];
+
+ /* Only allocate pinmux gpiopins if port != PORT_A (port 0) */
+ /* NOTE! crisv32_pinmux_alloc thinks PORT_B is port 0 */
+ if (port != 0 && crisv32_pinmux_alloc(port - 1, pin, pin, pinmux_gpio))
+ return -EIO;
+ DEBUG(printk(KERN_DEBUG "crisv32_io_get: Allocated pin %d on port %d\n",
+ pin, port));
+
+ return 0;
+}
+
+int crisv32_io_get_name(struct crisv32_iopin *iopin, const char *name)
+{
+ int port;
+ int pin;
+
+ if (toupper(*name) == 'P')
+ name++;
+
+ if (toupper(*name) < 'A' || toupper(*name) > 'E')
+ return -EINVAL;
+
+ port = toupper(*name) - 'A';
+ name++;
+ pin = simple_strtoul(name, NULL, 10);
+
+ if (pin < 0 || pin > crisv32_ioports[port].pin_count)
+ return -EINVAL;
+
+ iopin->bit = 1 << pin;
+ iopin->port = &crisv32_ioports[port];
+
+ /* Only allocate pinmux gpiopins if port != PORT_A (port 0) */
+ /* NOTE! crisv32_pinmux_alloc thinks PORT_B is port 0 */
+ if (port != 0 && crisv32_pinmux_alloc(port - 1, pin, pin, pinmux_gpio))
+ return -EIO;
+
+ DEBUG(printk(KERN_DEBUG
+ "crisv32_io_get_name: Allocated pin %d on port %d\n",
+ pin, port));
+
+ return 0;
+}
+
+#ifdef CONFIG_PCI
+/* PCI I/O access stuff */
+struct cris_io_operations *cris_iops = NULL;
+EXPORT_SYMBOL(cris_iops);
+#endif
diff --git a/arch/cris/arch-v32/mach-fs/pinmux.c b/arch/cris/arch-v32/mach-fs/pinmux.c
new file mode 100644
index 000000000..05a04708b
--- /dev/null
+++ b/arch/cris/arch-v32/mach-fs/pinmux.c
@@ -0,0 +1,323 @@
+/*
+ * Allocator for I/O pins. All pins are allocated to GPIO at bootup.
+ * Unassigned pins and GPIO pins can be allocated to a fixed interface
+ * or the I/O processor instead.
+ *
+ * Copyright (c) 2004-2007 Axis Communications AB.
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/spinlock.h>
+#include <hwregs/reg_map.h>
+#include <hwregs/reg_rdwr.h>
+#include <pinmux.h>
+#include <hwregs/pinmux_defs.h>
+
+#undef DEBUG
+
+#define PORT_PINS 18
+#define PORTS 4
+
+static char pins[PORTS][PORT_PINS];
+static DEFINE_SPINLOCK(pinmux_lock);
+
+static void crisv32_pinmux_set(int port);
+
+static int __crisv32_pinmux_alloc(int port, int first_pin, int last_pin,
+ enum pin_mode mode)
+{
+ int i;
+
+ for (i = first_pin; i <= last_pin; i++) {
+ if ((pins[port][i] != pinmux_none)
+ && (pins[port][i] != pinmux_gpio)
+ && (pins[port][i] != mode)) {
+#ifdef DEBUG
+ panic("Pinmux alloc failed!\n");
+#endif
+ return -EPERM;
+ }
+ }
+
+ for (i = first_pin; i <= last_pin; i++)
+ pins[port][i] = mode;
+
+ crisv32_pinmux_set(port);
+}
+
+static int crisv32_pinmux_init(void)
+{
+ static int initialized;
+
+ if (!initialized) {
+ reg_pinmux_rw_pa pa = REG_RD(pinmux, regi_pinmux, rw_pa);
+ initialized = 1;
+ REG_WR_INT(pinmux, regi_pinmux, rw_hwprot, 0);
+ pa.pa0 = pa.pa1 = pa.pa2 = pa.pa3 =
+ pa.pa4 = pa.pa5 = pa.pa6 = pa.pa7 = regk_pinmux_yes;
+ REG_WR(pinmux, regi_pinmux, rw_pa, pa);
+ __crisv32_pinmux_alloc(PORT_B, 0, PORT_PINS - 1, pinmux_gpio);
+ __crisv32_pinmux_alloc(PORT_C, 0, PORT_PINS - 1, pinmux_gpio);
+ __crisv32_pinmux_alloc(PORT_D, 0, PORT_PINS - 1, pinmux_gpio);
+ __crisv32_pinmux_alloc(PORT_E, 0, PORT_PINS - 1, pinmux_gpio);
+ }
+
+ return 0;
+}
+
+int crisv32_pinmux_alloc(int port, int first_pin, int last_pin,
+ enum pin_mode mode)
+{
+ unsigned long flags;
+ int ret;
+
+ crisv32_pinmux_init();
+
+ if (port > PORTS || port < 0)
+ return -EINVAL;
+
+ spin_lock_irqsave(&pinmux_lock, flags);
+
+ ret = __crisv32_pinmux_alloc(port, first_pin, last_pin, mode);
+
+ spin_unlock_irqrestore(&pinmux_lock, flags);
+
+ return ret;
+}
+
+int crisv32_pinmux_alloc_fixed(enum fixed_function function)
+{
+ int ret = -EINVAL;
+ char saved[sizeof pins];
+ unsigned long flags;
+
+ spin_lock_irqsave(&pinmux_lock, flags);
+
+ /* Save internal data for recovery */
+ memcpy(saved, pins, sizeof pins);
+
+ crisv32_pinmux_init(); /* Must be done before we read rw_hwprot */
+
+ reg_pinmux_rw_hwprot hwprot = REG_RD(pinmux, regi_pinmux, rw_hwprot);
+
+ switch (function) {
+ case pinmux_ser1:
+ ret = __crisv32_pinmux_alloc(PORT_C, 4, 7, pinmux_fixed);
+ hwprot.ser1 = regk_pinmux_yes;
+ break;
+ case pinmux_ser2:
+ ret = __crisv32_pinmux_alloc(PORT_C, 8, 11, pinmux_fixed);
+ hwprot.ser2 = regk_pinmux_yes;
+ break;
+ case pinmux_ser3:
+ ret = __crisv32_pinmux_alloc(PORT_C, 12, 15, pinmux_fixed);
+ hwprot.ser3 = regk_pinmux_yes;
+ break;
+ case pinmux_sser0:
+ ret = __crisv32_pinmux_alloc(PORT_C, 0, 3, pinmux_fixed);
+ ret |= __crisv32_pinmux_alloc(PORT_C, 16, 16, pinmux_fixed);
+ hwprot.sser0 = regk_pinmux_yes;
+ break;
+ case pinmux_sser1:
+ ret = __crisv32_pinmux_alloc(PORT_D, 0, 4, pinmux_fixed);
+ hwprot.sser1 = regk_pinmux_yes;
+ break;
+ case pinmux_ata0:
+ ret = __crisv32_pinmux_alloc(PORT_D, 5, 7, pinmux_fixed);
+ ret |= __crisv32_pinmux_alloc(PORT_D, 15, 17, pinmux_fixed);
+ hwprot.ata0 = regk_pinmux_yes;
+ break;
+ case pinmux_ata1:
+ ret = __crisv32_pinmux_alloc(PORT_D, 0, 4, pinmux_fixed);
+ ret |= __crisv32_pinmux_alloc(PORT_E, 17, 17, pinmux_fixed);
+ hwprot.ata1 = regk_pinmux_yes;
+ break;
+ case pinmux_ata2:
+ ret = __crisv32_pinmux_alloc(PORT_C, 11, 15, pinmux_fixed);
+ ret |= __crisv32_pinmux_alloc(PORT_E, 3, 3, pinmux_fixed);
+ hwprot.ata2 = regk_pinmux_yes;
+ break;
+ case pinmux_ata3:
+ ret = __crisv32_pinmux_alloc(PORT_C, 8, 10, pinmux_fixed);
+ ret |= __crisv32_pinmux_alloc(PORT_C, 0, 2, pinmux_fixed);
+ hwprot.ata2 = regk_pinmux_yes;
+ break;
+ case pinmux_ata:
+ ret = __crisv32_pinmux_alloc(PORT_B, 0, 15, pinmux_fixed);
+ ret |= __crisv32_pinmux_alloc(PORT_D, 8, 15, pinmux_fixed);
+ hwprot.ata = regk_pinmux_yes;
+ break;
+ case pinmux_eth1:
+ ret = __crisv32_pinmux_alloc(PORT_E, 0, 17, pinmux_fixed);
+ hwprot.eth1 = regk_pinmux_yes;
+ hwprot.eth1_mgm = regk_pinmux_yes;
+ break;
+ case pinmux_timer:
+ ret = __crisv32_pinmux_alloc(PORT_C, 16, 16, pinmux_fixed);
+ hwprot.timer = regk_pinmux_yes;
+ spin_unlock_irqrestore(&pinmux_lock, flags);
+ return ret;
+ }
+
+ if (!ret)
+ REG_WR(pinmux, regi_pinmux, rw_hwprot, hwprot);
+ else
+ memcpy(pins, saved, sizeof pins);
+
+ spin_unlock_irqrestore(&pinmux_lock, flags);
+
+ return ret;
+}
+
+void crisv32_pinmux_set(int port)
+{
+ int i;
+ int gpio_val = 0;
+ int iop_val = 0;
+
+ for (i = 0; i < PORT_PINS; i++) {
+ if (pins[port][i] == pinmux_gpio)
+ gpio_val |= (1 << i);
+ else if (pins[port][i] == pinmux_iop)
+ iop_val |= (1 << i);
+ }
+
+ REG_WRITE(int, regi_pinmux + REG_RD_ADDR_pinmux_rw_pb_gio + 8 * port,
+ gpio_val);
+ REG_WRITE(int, regi_pinmux + REG_RD_ADDR_pinmux_rw_pb_iop + 8 * port,
+ iop_val);
+
+#ifdef DEBUG
+ crisv32_pinmux_dump();
+#endif
+}
+
+static int __crisv32_pinmux_dealloc(int port, int first_pin, int last_pin)
+{
+ int i;
+
+ for (i = first_pin; i <= last_pin; i++)
+ pins[port][i] = pinmux_none;
+
+ crisv32_pinmux_set(port);
+ return 0;
+}
+
+int crisv32_pinmux_dealloc(int port, int first_pin, int last_pin)
+{
+ unsigned long flags;
+
+ crisv32_pinmux_init();
+
+ if (port > PORTS || port < 0)
+ return -EINVAL;
+
+ spin_lock_irqsave(&pinmux_lock, flags);
+ __crisv32_pinmux_dealloc(port, first_pin, last_pin);
+ spin_unlock_irqrestore(&pinmux_lock, flags);
+
+ return 0;
+}
+
+int crisv32_pinmux_dealloc_fixed(enum fixed_function function)
+{
+ int ret = -EINVAL;
+ char saved[sizeof pins];
+ unsigned long flags;
+
+ spin_lock_irqsave(&pinmux_lock, flags);
+
+ /* Save internal data for recovery */
+ memcpy(saved, pins, sizeof pins);
+
+ crisv32_pinmux_init(); /* Must be done before we read rw_hwprot */
+
+ reg_pinmux_rw_hwprot hwprot = REG_RD(pinmux, regi_pinmux, rw_hwprot);
+
+ switch (function) {
+ case pinmux_ser1:
+ ret = __crisv32_pinmux_dealloc(PORT_C, 4, 7);
+ hwprot.ser1 = regk_pinmux_no;
+ break;
+ case pinmux_ser2:
+ ret = __crisv32_pinmux_dealloc(PORT_C, 8, 11);
+ hwprot.ser2 = regk_pinmux_no;
+ break;
+ case pinmux_ser3:
+ ret = __crisv32_pinmux_dealloc(PORT_C, 12, 15);
+ hwprot.ser3 = regk_pinmux_no;
+ break;
+ case pinmux_sser0:
+ ret = __crisv32_pinmux_dealloc(PORT_C, 0, 3);
+ ret |= __crisv32_pinmux_dealloc(PORT_C, 16, 16);
+ hwprot.sser0 = regk_pinmux_no;
+ break;
+ case pinmux_sser1:
+ ret = __crisv32_pinmux_dealloc(PORT_D, 0, 4);
+ hwprot.sser1 = regk_pinmux_no;
+ break;
+ case pinmux_ata0:
+ ret = __crisv32_pinmux_dealloc(PORT_D, 5, 7);
+ ret |= __crisv32_pinmux_dealloc(PORT_D, 15, 17);
+ hwprot.ata0 = regk_pinmux_no;
+ break;
+ case pinmux_ata1:
+ ret = __crisv32_pinmux_dealloc(PORT_D, 0, 4);
+ ret |= __crisv32_pinmux_dealloc(PORT_E, 17, 17);
+ hwprot.ata1 = regk_pinmux_no;
+ break;
+ case pinmux_ata2:
+ ret = __crisv32_pinmux_dealloc(PORT_C, 11, 15);
+ ret |= __crisv32_pinmux_dealloc(PORT_E, 3, 3);
+ hwprot.ata2 = regk_pinmux_no;
+ break;
+ case pinmux_ata3:
+ ret = __crisv32_pinmux_dealloc(PORT_C, 8, 10);
+ ret |= __crisv32_pinmux_dealloc(PORT_C, 0, 2);
+ hwprot.ata2 = regk_pinmux_no;
+ break;
+ case pinmux_ata:
+ ret = __crisv32_pinmux_dealloc(PORT_B, 0, 15);
+ ret |= __crisv32_pinmux_dealloc(PORT_D, 8, 15);
+ hwprot.ata = regk_pinmux_no;
+ break;
+ case pinmux_eth1:
+ ret = __crisv32_pinmux_dealloc(PORT_E, 0, 17);
+ hwprot.eth1 = regk_pinmux_no;
+ hwprot.eth1_mgm = regk_pinmux_no;
+ break;
+ case pinmux_timer:
+ ret = __crisv32_pinmux_dealloc(PORT_C, 16, 16);
+ hwprot.timer = regk_pinmux_no;
+ spin_unlock_irqrestore(&pinmux_lock, flags);
+ return ret;
+ }
+
+ if (!ret)
+ REG_WR(pinmux, regi_pinmux, rw_hwprot, hwprot);
+ else
+ memcpy(pins, saved, sizeof pins);
+
+ spin_unlock_irqrestore(&pinmux_lock, flags);
+
+ return ret;
+}
+
+#ifdef DEBUG
+static void crisv32_pinmux_dump(void)
+{
+ int i, j;
+
+ crisv32_pinmux_init();
+
+ for (i = 0; i < PORTS; i++) {
+ printk(KERN_DEBUG "Port %c\n", 'B' + i);
+ for (j = 0; j < PORT_PINS; j++)
+ printk(KERN_DEBUG " Pin %d = %d\n", j, pins[i][j]);
+ }
+}
+#endif
+__initcall(crisv32_pinmux_init);