443 lines
13 KiB
Diff
443 lines
13 KiB
Diff
# Description: Adds a new OF-based serial driver instead of the bit-banging # one.
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# Patch author: David Woodhouse <dwmw2@infradead.org>
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# Upstream status: Well, this should replace the hacky workaround
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# introduced in the powerpc-serial patch. not yet enabled though as i am
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# unsure how this will work on PReP hardware.
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--- linux-2.6.12/drivers/serial/Makefile~ 2005-08-11 13:51:50.000000000 +0100
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+++ linux-2.6.12/drivers/serial/Makefile 2005-08-15 21:08:49.000000000 +0100
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@@ -22,6 +22,7 @@ obj-$(CONFIG_SERIAL_8250_ACCENT) += 8250
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obj-$(CONFIG_SERIAL_8250_BOCA) += 8250_boca.o
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obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o
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obj-$(CONFIG_SERIAL_8250_MCA) += 8250_mca.o
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+obj-$(CONFIG_SERIAL_8250_OF) += 8250_of.o
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obj-$(CONFIG_SERIAL_AMBA_PL010) += amba-pl010.o
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obj-$(CONFIG_SERIAL_AMBA_PL011) += amba-pl011.o
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obj-$(CONFIG_SERIAL_CLPS711X) += clps711x.o
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--- linux-2.6.12/drivers/serial/8250_of.c~ 2005-08-15 21:14:27.000000000 +0100
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+++ linux-2.6.12/drivers/serial/8250_of.c 2005-08-15 21:20:59.000000000 +0100
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@@ -0,0 +1,199 @@
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+#include <linux/kernel.h>
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+#include <linux/serial.h>
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+#include <linux/serial_8250.h>
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+#include <linux/config.h>
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/pci.h>
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+#include <asm/serial.h>
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+#include <asm/prom.h>
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+
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+#if 0
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+#define DBG(fmt...) printk(KERN_DEBUG fmt)
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+#else
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+#define DBG(fmt) do { } while (0)
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+#endif
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+
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+/*
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+ * This function can be used by platforms to "find" legacy serial ports.
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+ * It works for "serial" nodes under an "isa" node, and will try to
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+ * respect the "ibm,aix-loc" property if any. It works with up to 8
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+ * ports.
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+ */
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+
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+#define MAX_LEGACY_SERIAL_PORTS 8
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+static int ports_probed = 0;
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+
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+static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1];
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+static unsigned int old_serial_count;
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+
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+void __init generic_find_legacy_serial_ports(u64 *physport,
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+ unsigned int *default_speed)
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+{
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+ struct device_node *np;
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+ u32 *sizeprop;
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+
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+ struct isa_reg_property {
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+ u32 space;
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+ u32 address;
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+ u32 size;
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+ };
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+
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+ DBG(" -> generic_find_legacy_serial_port()\n");
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+ ports_probed = 1;
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+
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+ *physport = 0;
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+ if (default_speed)
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+ *default_speed = 0;
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+
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+ np = of_find_node_by_path("/");
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+ if (!np)
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+ return;
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+
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+ /* First fill our array */
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+ for (np = NULL; (np = of_find_node_by_type(np, "serial"));) {
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+ struct device_node *isa, *pci;
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+ struct isa_reg_property *reg;
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+ unsigned long phys_size, addr_size;
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+ u64 io_base;
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+ u32 *rangesp;
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+ u32 *interrupts, *clk, *spd;
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+ char *typep;
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+ int index, rlen, rentsize;
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+
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+ /* Ok, first check if it's under an "isa" parent */
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+ isa = of_get_parent(np);
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+ if (!isa || strcmp(isa->name, "isa")) {
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+ DBG("%s: no isa parent found\n", np->full_name);
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+ continue;
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+ }
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+
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+ /* Now look for an "ibm,aix-loc" property that gives us ordering
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+ * if any...
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+ */
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+ typep = (char *)get_property(np, "ibm,aix-loc", NULL);
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+
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+ /* Get the ISA port number */
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+ reg = (struct isa_reg_property *)get_property(np, "reg", NULL);
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+ if (reg == NULL)
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+ goto next_port;
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+ /* We assume the interrupt number isn't translated ... */
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+ interrupts = (u32 *)get_property(np, "interrupts", NULL);
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+ /* get clock freq. if present */
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+ clk = (u32 *)get_property(np, "clock-frequency", NULL);
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+ /* get default speed if present */
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+ spd = (u32 *)get_property(np, "current-speed", NULL);
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+ /* Default to locate at end of array */
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+ index = old_serial_count; /* end of the array by default */
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+
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+ /* If we have a location index, then use it */
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+ if (typep && *typep == 'S') {
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+ index = simple_strtol(typep+1, NULL, 0) - 1;
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+ /* if index is out of range, use end of array instead */
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+ if (index >= MAX_LEGACY_SERIAL_PORTS)
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+ index = old_serial_count;
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+ /* if our index is still out of range, that mean that
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+ * array is full, we could scan for a free slot but that
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+ * make little sense to bother, just skip the port
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+ */
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+ if (index >= MAX_LEGACY_SERIAL_PORTS)
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+ goto next_port;
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+ if (index >= old_serial_count)
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+ old_serial_count = index + 1;
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+ /* Check if there is a port who already claimed our slot */
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+ if (serial_ports[index].iobase != 0) {
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+ /* if we still have some room, move it, else override */
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+ if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) {
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+ DBG("Moved legacy port %d -> %d\n", index,
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+ old_serial_count);
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+ serial_ports[old_serial_count++] =
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+ serial_ports[index];
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+ } else {
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+ DBG("Replacing legacy port %d\n", index);
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+ }
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+ }
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+ }
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+ if (index >= MAX_LEGACY_SERIAL_PORTS)
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+ goto next_port;
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+ if (index >= old_serial_count)
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+ old_serial_count = index + 1;
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+
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+ /* Now fill the entry */
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+ memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port));
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+ serial_ports[index].uartclk = (clk && *clk) ? *clk : BASE_BAUD * 16;
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+ serial_ports[index].iobase = reg->address;
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+ serial_ports[index].irq = interrupts ? interrupts[0] : 0;
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+ serial_ports[index].flags = ASYNC_BOOT_AUTOCONF;
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+
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+ DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n",
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+ index,
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+ serial_ports[index].iobase,
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+ serial_ports[index].irq,
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+ serial_ports[index].uartclk);
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+
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+ /* Get phys address of IO reg for port 1 */
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+ if (index != 0)
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+ goto next_port;
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+
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+ pci = of_get_parent(isa);
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+ if (!pci) {
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+ DBG("%s: no pci parent found\n", np->full_name);
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+ goto next_port;
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+ }
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+
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+ rangesp = (u32 *)get_property(pci, "ranges", &rlen);
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+ if (rangesp == NULL) {
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+ of_node_put(pci);
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+ goto next_port;
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+ }
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+ rlen /= 4;
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+
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+ /* we need the #size-cells of the PCI bridge node itself */
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+ phys_size = 1;
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+ sizeprop = (u32 *)get_property(pci, "#size-cells", NULL);
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+ if (sizeprop != NULL)
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+ phys_size = *sizeprop;
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+ /* we need the parent #addr-cells */
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+ addr_size = prom_n_addr_cells(pci);
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+ rentsize = 3 + addr_size + phys_size;
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+ io_base = 0;
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+ for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) {
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+ if (((rangesp[0] >> 24) & 0x3) != 1)
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+ continue; /* not IO space */
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+ io_base = rangesp[3];
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+ if (addr_size == 2)
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+ io_base = (io_base << 32) | rangesp[4];
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+ }
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+ if (io_base != 0) {
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+ *physport = io_base + reg->address;
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+ if (default_speed && spd)
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+ *default_speed = *spd;
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+ }
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+ of_node_put(pci);
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+ next_port:
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+ of_node_put(isa);
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+ }
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+
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+ DBG(" <- generic_find_legacy_serial_port()\n");
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+}
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+
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+static struct platform_device serial_device = {
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+ .name = "serial8250",
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+ .id = 0,
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+ .dev = {
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+ .platform_data = serial_ports,
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+ },
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+};
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+
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+static int __init serial_dev_init(void)
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+{
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+ u64 phys;
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+ unsigned int spd;
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+
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+ if (!ports_probed)
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+ generic_find_legacy_serial_ports(&phys, &spd);
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+ return platform_device_register(&serial_device);
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+}
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+arch_initcall(serial_dev_init);
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+
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+
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--- linux-2.6.12/drivers/serial/Kconfig~ 2005-08-11 13:51:50.000000000 +0100
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+++ linux-2.6.12/drivers/serial/Kconfig 2005-08-15 21:13:41.000000000 +0100
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@@ -77,6 +77,11 @@ config SERIAL_8250_CS
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If unsure, say N.
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+config SERIAL_8250_OF
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+ bool
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+ default y
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+ depends on PPC_OF && SERIAL_8250 != n
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+
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config SERIAL_8250_ACPI
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bool "8250/16550 device discovery via ACPI namespace"
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default y if IA64
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--- linux-2.6.12/arch/ppc64/kernel/setup.c~ 2005-08-11 13:52:04.000000000 +0100
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+++ linux-2.6.12/arch/ppc64/kernel/setup.c 2005-08-15 20:27:25.000000000 +0100
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@@ -1147,186 +1147,6 @@ void __init setup_default_decr(void)
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lpaca->next_jiffy_update_tb = get_tb() + tb_ticks_per_jiffy;
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}
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-#ifndef CONFIG_PPC_ISERIES
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-/*
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- * This function can be used by platforms to "find" legacy serial ports.
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- * It works for "serial" nodes under an "isa" node, and will try to
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- * respect the "ibm,aix-loc" property if any. It works with up to 8
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- * ports.
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- */
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-
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-#define MAX_LEGACY_SERIAL_PORTS 8
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-static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1];
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-static unsigned int old_serial_count;
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-
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-void __init generic_find_legacy_serial_ports(u64 *physport,
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- unsigned int *default_speed)
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-{
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- struct device_node *np;
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- u32 *sizeprop;
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-
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- struct isa_reg_property {
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- u32 space;
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- u32 address;
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- u32 size;
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- };
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- struct pci_reg_property {
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- struct pci_address addr;
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- u32 size_hi;
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- u32 size_lo;
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- };
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-
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- DBG(" -> generic_find_legacy_serial_port()\n");
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-
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- *physport = 0;
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- if (default_speed)
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- *default_speed = 0;
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-
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- np = of_find_node_by_path("/");
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- if (!np)
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- return;
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-
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- /* First fill our array */
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- for (np = NULL; (np = of_find_node_by_type(np, "serial"));) {
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- struct device_node *isa, *pci;
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- struct isa_reg_property *reg;
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- unsigned long phys_size, addr_size, io_base;
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- u32 *rangesp;
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- u32 *interrupts, *clk, *spd;
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- char *typep;
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- int index, rlen, rentsize;
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-
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- /* Ok, first check if it's under an "isa" parent */
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- isa = of_get_parent(np);
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- if (!isa || strcmp(isa->name, "isa")) {
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- DBG("%s: no isa parent found\n", np->full_name);
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- continue;
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- }
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-
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- /* Now look for an "ibm,aix-loc" property that gives us ordering
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- * if any...
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- */
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- typep = (char *)get_property(np, "ibm,aix-loc", NULL);
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-
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- /* Get the ISA port number */
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- reg = (struct isa_reg_property *)get_property(np, "reg", NULL);
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- if (reg == NULL)
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- goto next_port;
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- /* We assume the interrupt number isn't translated ... */
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- interrupts = (u32 *)get_property(np, "interrupts", NULL);
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- /* get clock freq. if present */
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- clk = (u32 *)get_property(np, "clock-frequency", NULL);
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- /* get default speed if present */
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- spd = (u32 *)get_property(np, "current-speed", NULL);
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- /* Default to locate at end of array */
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- index = old_serial_count; /* end of the array by default */
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-
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- /* If we have a location index, then use it */
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- if (typep && *typep == 'S') {
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- index = simple_strtol(typep+1, NULL, 0) - 1;
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- /* if index is out of range, use end of array instead */
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- if (index >= MAX_LEGACY_SERIAL_PORTS)
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- index = old_serial_count;
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- /* if our index is still out of range, that mean that
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- * array is full, we could scan for a free slot but that
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- * make little sense to bother, just skip the port
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- */
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- if (index >= MAX_LEGACY_SERIAL_PORTS)
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- goto next_port;
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- if (index >= old_serial_count)
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- old_serial_count = index + 1;
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- /* Check if there is a port who already claimed our slot */
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- if (serial_ports[index].iobase != 0) {
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- /* if we still have some room, move it, else override */
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- if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) {
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- DBG("Moved legacy port %d -> %d\n", index,
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- old_serial_count);
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- serial_ports[old_serial_count++] =
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- serial_ports[index];
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- } else {
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- DBG("Replacing legacy port %d\n", index);
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- }
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- }
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- }
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- if (index >= MAX_LEGACY_SERIAL_PORTS)
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- goto next_port;
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- if (index >= old_serial_count)
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- old_serial_count = index + 1;
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-
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- /* Now fill the entry */
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- memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port));
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- serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16;
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- serial_ports[index].iobase = reg->address;
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- serial_ports[index].irq = interrupts ? interrupts[0] : 0;
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- serial_ports[index].flags = ASYNC_BOOT_AUTOCONF;
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-
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- DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n",
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- index,
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- serial_ports[index].iobase,
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- serial_ports[index].irq,
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- serial_ports[index].uartclk);
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-
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- /* Get phys address of IO reg for port 1 */
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- if (index != 0)
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- goto next_port;
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-
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- pci = of_get_parent(isa);
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- if (!pci) {
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- DBG("%s: no pci parent found\n", np->full_name);
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- goto next_port;
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- }
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-
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- rangesp = (u32 *)get_property(pci, "ranges", &rlen);
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- if (rangesp == NULL) {
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- of_node_put(pci);
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- goto next_port;
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- }
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- rlen /= 4;
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-
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- /* we need the #size-cells of the PCI bridge node itself */
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- phys_size = 1;
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- sizeprop = (u32 *)get_property(pci, "#size-cells", NULL);
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- if (sizeprop != NULL)
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- phys_size = *sizeprop;
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- /* we need the parent #addr-cells */
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- addr_size = prom_n_addr_cells(pci);
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- rentsize = 3 + addr_size + phys_size;
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- io_base = 0;
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- for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) {
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- if (((rangesp[0] >> 24) & 0x3) != 1)
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- continue; /* not IO space */
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- io_base = rangesp[3];
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- if (addr_size == 2)
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- io_base = (io_base << 32) | rangesp[4];
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- }
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- if (io_base != 0) {
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- *physport = io_base + reg->address;
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- if (default_speed && spd)
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- *default_speed = *spd;
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- }
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- of_node_put(pci);
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- next_port:
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- of_node_put(isa);
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- }
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-
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- DBG(" <- generic_find_legacy_serial_port()\n");
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-}
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-
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-static struct platform_device serial_device = {
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- .name = "serial8250",
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- .id = 0,
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- .dev = {
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- .platform_data = serial_ports,
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- },
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-};
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-
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-static int __init serial_dev_init(void)
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-{
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- return platform_device_register(&serial_device);
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-}
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-arch_initcall(serial_dev_init);
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-
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-#endif /* CONFIG_PPC_ISERIES */
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int check_legacy_ioport(unsigned long base_port)
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{
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--- linux-2.6.12/include/asm-ppc/pc_serial.h~ 2005-08-15 21:19:32.000000000 +0100
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+++ linux-2.6.12/include/asm-ppc/pc_serial.h 2005-08-15 21:20:24.000000000 +0100
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@@ -26,18 +26,3 @@
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#define RS_TABLE_SIZE 4
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#endif
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-/* Standard COM flags (except for COM4, because of the 8514 problem) */
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-#ifdef CONFIG_SERIAL_DETECT_IRQ
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-#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ)
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-#define STD_COM4_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_AUTO_IRQ)
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-#else
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-#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
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-#define STD_COM4_FLAGS ASYNC_BOOT_AUTOCONF
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-#endif
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-
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-#define SERIAL_PORT_DFNS \
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- /* UART CLK PORT IRQ FLAGS */ \
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- { 0, BASE_BAUD, 0x3F8, 4, STD_COM_FLAGS }, /* ttyS0 */ \
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- { 0, BASE_BAUD, 0x2F8, 3, STD_COM_FLAGS }, /* ttyS1 */ \
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- { 0, BASE_BAUD, 0x3E8, 4, STD_COM_FLAGS }, /* ttyS2 */ \
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- { 0, BASE_BAUD, 0x2E8, 3, STD_COM4_FLAGS }, /* ttyS3 */
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