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xianfeng |
#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/serial_core.h>
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#include <linux/console.h>
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#include <linux/pci.h>
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#include <asm/io.h>
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#include <asm/mmu.h>
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#include <asm/prom.h>
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#include <asm/serial.h>
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#include <asm/udbg.h>
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#include <asm/pci-bridge.h>
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#include <asm/ppc-pci.h>
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(fmt...) do { printk(fmt); } while(0)
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#else
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#define DBG(fmt...) do { } while(0)
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#endif
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#define MAX_LEGACY_SERIAL_PORTS 8
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static struct plat_serial8250_port
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legacy_serial_ports[MAX_LEGACY_SERIAL_PORTS+1];
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static struct legacy_serial_info {
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struct device_node *np;
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unsigned int speed;
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unsigned int clock;
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int irq_check_parent;
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phys_addr_t taddr;
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} legacy_serial_infos[MAX_LEGACY_SERIAL_PORTS];
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static unsigned int legacy_serial_count;
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static int legacy_serial_console = -1;
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static int __init add_legacy_port(struct device_node *np, int want_index,
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int iotype, phys_addr_t base,
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phys_addr_t taddr, unsigned long irq,
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upf_t flags, int irq_check_parent)
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{
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const u32 *clk, *spd;
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u32 clock = BASE_BAUD * 16;
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int index;
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/* get clock freq. if present */
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clk = of_get_property(np, "clock-frequency", NULL);
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if (clk && *clk)
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clock = *clk;
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/* get default speed if present */
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spd = of_get_property(np, "current-speed", NULL);
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/* If we have a location index, then try to use it */
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if (want_index >= 0 && want_index < MAX_LEGACY_SERIAL_PORTS)
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index = want_index;
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else
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index = legacy_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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return -1;
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if (index >= legacy_serial_count)
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legacy_serial_count = index + 1;
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/* Check if there is a port who already claimed our slot */
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if (legacy_serial_infos[index].np != 0) {
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/* if we still have some room, move it, else override */
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if (legacy_serial_count < MAX_LEGACY_SERIAL_PORTS) {
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printk(KERN_DEBUG "Moved legacy port %d -> %d\n",
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index, legacy_serial_count);
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legacy_serial_ports[legacy_serial_count] =
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legacy_serial_ports[index];
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legacy_serial_infos[legacy_serial_count] =
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legacy_serial_infos[index];
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legacy_serial_count++;
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} else {
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printk(KERN_DEBUG "Replacing legacy port %d\n", index);
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}
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}
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/* Now fill the entry */
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memset(&legacy_serial_ports[index], 0,
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sizeof(struct plat_serial8250_port));
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if (iotype == UPIO_PORT)
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legacy_serial_ports[index].iobase = base;
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else
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legacy_serial_ports[index].mapbase = base;
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legacy_serial_ports[index].iotype = iotype;
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legacy_serial_ports[index].uartclk = clock;
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legacy_serial_ports[index].irq = irq;
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legacy_serial_ports[index].flags = flags;
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legacy_serial_infos[index].taddr = taddr;
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legacy_serial_infos[index].np = of_node_get(np);
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legacy_serial_infos[index].clock = clock;
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legacy_serial_infos[index].speed = spd ? *spd : 0;
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legacy_serial_infos[index].irq_check_parent = irq_check_parent;
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printk(KERN_DEBUG "Found legacy serial port %d for %s\n",
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index, np->full_name);
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printk(KERN_DEBUG " %s=%llx, taddr=%llx, irq=%lx, clk=%d, speed=%d\n",
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(iotype == UPIO_PORT) ? "port" : "mem",
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(unsigned long long)base, (unsigned long long)taddr, irq,
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legacy_serial_ports[index].uartclk,
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legacy_serial_infos[index].speed);
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return index;
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}
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static int __init add_legacy_soc_port(struct device_node *np,
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struct device_node *soc_dev)
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{
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u64 addr;
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const u32 *addrp;
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upf_t flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ
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| UPF_FIXED_PORT;
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struct device_node *tsi = of_get_parent(np);
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/* We only support ports that have a clock frequency properly
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* encoded in the device-tree.
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*/
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if (of_get_property(np, "clock-frequency", NULL) == NULL)
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return -1;
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/* if rtas uses this device, don't try to use it as well */
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if (of_get_property(np, "used-by-rtas", NULL) != NULL)
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return -1;
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131 |
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/* Get the address */
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addrp = of_get_address(soc_dev, 0, NULL, NULL);
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if (addrp == NULL)
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return -1;
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addr = of_translate_address(soc_dev, addrp);
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if (addr == OF_BAD_ADDR)
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return -1;
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/* Add port, irq will be dealt with later. We passed a translated
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* IO port value. It will be fixed up later along with the irq
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*/
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if (tsi && !strcmp(tsi->type, "tsi-bridge"))
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return add_legacy_port(np, -1, UPIO_TSI, addr, addr, NO_IRQ, flags, 0);
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else
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return add_legacy_port(np, -1, UPIO_MEM, addr, addr, NO_IRQ, flags, 0);
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}
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static int __init add_legacy_isa_port(struct device_node *np,
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struct device_node *isa_brg)
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{
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const u32 *reg;
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const char *typep;
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int index = -1;
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u64 taddr;
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DBG(" -> add_legacy_isa_port(%s)\n", np->full_name);
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/* Get the ISA port number */
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reg = of_get_property(np, "reg", NULL);
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if (reg == NULL)
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return -1;
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/* Verify it's an IO port, we don't support anything else */
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if (!(reg[0] & 0x00000001))
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return -1;
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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 = of_get_property(np, "ibm,aix-loc", NULL);
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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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/* Translate ISA address. If it fails, we still register the port
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* with no translated address so that it can be picked up as an IO
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* port later by the serial driver
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*/
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taddr = of_translate_address(np, reg);
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if (taddr == OF_BAD_ADDR)
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taddr = 0;
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/* Add port, irq will be dealt with later */
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return add_legacy_port(np, index, UPIO_PORT, reg[1], taddr,
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NO_IRQ, UPF_BOOT_AUTOCONF, 0);
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}
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#ifdef CONFIG_PCI
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static int __init add_legacy_pci_port(struct device_node *np,
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struct device_node *pci_dev)
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{
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u64 addr, base;
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const u32 *addrp;
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unsigned int flags;
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int iotype, index = -1, lindex = 0;
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DBG(" -> add_legacy_pci_port(%s)\n", np->full_name);
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/* We only support ports that have a clock frequency properly
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* encoded in the device-tree (that is have an fcode). Anything
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* else can't be used that early and will be normally probed by
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* the generic 8250_pci driver later on. The reason is that 8250
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* compatible UARTs on PCI need all sort of quirks (port offsets
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* etc...) that this code doesn't know about
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*/
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210 |
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if (of_get_property(np, "clock-frequency", NULL) == NULL)
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return -1;
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/* Get the PCI address. Assume BAR 0 */
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addrp = of_get_pci_address(pci_dev, 0, NULL, &flags);
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if (addrp == NULL)
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return -1;
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/* We only support BAR 0 for now */
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iotype = (flags & IORESOURCE_MEM) ? UPIO_MEM : UPIO_PORT;
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addr = of_translate_address(pci_dev, addrp);
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if (addr == OF_BAD_ADDR)
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return -1;
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224 |
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/* Set the IO base to the same as the translated address for MMIO,
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* or to the domain local IO base for PIO (it will be fixed up later)
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*/
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if (iotype == UPIO_MEM)
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base = addr;
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else
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base = addrp[2];
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231 |
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232 |
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/* Try to guess an index... If we have subdevices of the pci dev,
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* we get to their "reg" property
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234 |
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*/
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235 |
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if (np != pci_dev) {
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const u32 *reg = of_get_property(np, "reg", NULL);
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237 |
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if (reg && (*reg < 4))
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index = lindex = *reg;
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239 |
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}
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240 |
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241 |
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/* Local index means it's the Nth port in the PCI chip. Unfortunately
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242 |
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* the offset to add here is device specific. We know about those
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243 |
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* EXAR ports and we default to the most common case. If your UART
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244 |
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* doesn't work for these settings, you'll have to add your own special
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245 |
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* cases here
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246 |
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*/
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247 |
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if (of_device_is_compatible(pci_dev, "pci13a8,152") ||
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of_device_is_compatible(pci_dev, "pci13a8,154") ||
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of_device_is_compatible(pci_dev, "pci13a8,158")) {
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addr += 0x200 * lindex;
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base += 0x200 * lindex;
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} else {
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addr += 8 * lindex;
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base += 8 * lindex;
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}
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256 |
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257 |
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/* Add port, irq will be dealt with later. We passed a translated
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258 |
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* IO port value. It will be fixed up later along with the irq
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259 |
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*/
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260 |
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return add_legacy_port(np, index, iotype, base, addr, NO_IRQ,
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UPF_BOOT_AUTOCONF, np != pci_dev);
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}
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263 |
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#endif
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264 |
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265 |
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static void __init setup_legacy_serial_console(int console)
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{
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267 |
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struct legacy_serial_info *info =
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&legacy_serial_infos[console];
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269 |
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void __iomem *addr;
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270 |
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271 |
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if (info->taddr == 0)
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272 |
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return;
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273 |
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addr = ioremap(info->taddr, 0x1000);
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274 |
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if (addr == NULL)
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275 |
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return;
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276 |
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if (info->speed == 0)
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277 |
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info->speed = udbg_probe_uart_speed(addr, info->clock);
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278 |
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DBG("default console speed = %d\n", info->speed);
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279 |
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udbg_init_uart(addr, info->speed, info->clock);
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280 |
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}
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281 |
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282 |
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/*
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283 |
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* This is called very early, as part of setup_system() or eventually
|
284 |
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* setup_arch(), basically before anything else in this file. This function
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285 |
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* will try to build a list of all the available 8250-compatible serial ports
|
286 |
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* in the machine using the Open Firmware device-tree. It currently only deals
|
287 |
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* with ISA and PCI busses but could be extended. It allows a very early boot
|
288 |
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* console to be initialized, that list is also used later to provide 8250 with
|
289 |
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* the machine non-PCI ports and to properly pick the default console port
|
290 |
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*/
|
291 |
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void __init find_legacy_serial_ports(void)
|
292 |
|
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{
|
293 |
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struct device_node *np, *stdout = NULL;
|
294 |
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const char *path;
|
295 |
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int index;
|
296 |
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|
297 |
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DBG(" -> find_legacy_serial_port()\n");
|
298 |
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|
299 |
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/* Now find out if one of these is out firmware console */
|
300 |
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path = of_get_property(of_chosen, "linux,stdout-path", NULL);
|
301 |
|
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if (path != NULL) {
|
302 |
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stdout = of_find_node_by_path(path);
|
303 |
|
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if (stdout)
|
304 |
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DBG("stdout is %s\n", stdout->full_name);
|
305 |
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} else {
|
306 |
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DBG(" no linux,stdout-path !\n");
|
307 |
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}
|
308 |
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|
309 |
|
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/* First fill our array with SOC ports */
|
310 |
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for (np = NULL; (np = of_find_compatible_node(np, "serial", "ns16550")) != NULL;) {
|
311 |
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struct device_node *soc = of_get_parent(np);
|
312 |
|
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if (soc && !strcmp(soc->type, "soc")) {
|
313 |
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index = add_legacy_soc_port(np, np);
|
314 |
|
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if (index >= 0 && np == stdout)
|
315 |
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legacy_serial_console = index;
|
316 |
|
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}
|
317 |
|
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of_node_put(soc);
|
318 |
|
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}
|
319 |
|
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|
320 |
|
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/* First fill our array with ISA ports */
|
321 |
|
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for (np = NULL; (np = of_find_node_by_type(np, "serial"));) {
|
322 |
|
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struct device_node *isa = of_get_parent(np);
|
323 |
|
|
if (isa && !strcmp(isa->name, "isa")) {
|
324 |
|
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index = add_legacy_isa_port(np, isa);
|
325 |
|
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if (index >= 0 && np == stdout)
|
326 |
|
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legacy_serial_console = index;
|
327 |
|
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}
|
328 |
|
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of_node_put(isa);
|
329 |
|
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}
|
330 |
|
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|
331 |
|
|
/* First fill our array with tsi-bridge ports */
|
332 |
|
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for (np = NULL; (np = of_find_compatible_node(np, "serial", "ns16550")) != NULL;) {
|
333 |
|
|
struct device_node *tsi = of_get_parent(np);
|
334 |
|
|
if (tsi && !strcmp(tsi->type, "tsi-bridge")) {
|
335 |
|
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index = add_legacy_soc_port(np, np);
|
336 |
|
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if (index >= 0 && np == stdout)
|
337 |
|
|
legacy_serial_console = index;
|
338 |
|
|
}
|
339 |
|
|
of_node_put(tsi);
|
340 |
|
|
}
|
341 |
|
|
|
342 |
|
|
/* First fill our array with opb bus ports */
|
343 |
|
|
for (np = NULL; (np = of_find_compatible_node(np, "serial", "ns16550")) != NULL;) {
|
344 |
|
|
struct device_node *opb = of_get_parent(np);
|
345 |
|
|
if (opb && (!strcmp(opb->type, "opb") ||
|
346 |
|
|
of_device_is_compatible(opb, "ibm,opb"))) {
|
347 |
|
|
index = add_legacy_soc_port(np, np);
|
348 |
|
|
if (index >= 0 && np == stdout)
|
349 |
|
|
legacy_serial_console = index;
|
350 |
|
|
}
|
351 |
|
|
of_node_put(opb);
|
352 |
|
|
}
|
353 |
|
|
|
354 |
|
|
#ifdef CONFIG_PCI
|
355 |
|
|
/* Next, try to locate PCI ports */
|
356 |
|
|
for (np = NULL; (np = of_find_all_nodes(np));) {
|
357 |
|
|
struct device_node *pci, *parent = of_get_parent(np);
|
358 |
|
|
if (parent && !strcmp(parent->name, "isa")) {
|
359 |
|
|
of_node_put(parent);
|
360 |
|
|
continue;
|
361 |
|
|
}
|
362 |
|
|
if (strcmp(np->name, "serial") && strcmp(np->type, "serial")) {
|
363 |
|
|
of_node_put(parent);
|
364 |
|
|
continue;
|
365 |
|
|
}
|
366 |
|
|
/* Check for known pciclass, and also check wether we have
|
367 |
|
|
* a device with child nodes for ports or not
|
368 |
|
|
*/
|
369 |
|
|
if (of_device_is_compatible(np, "pciclass,0700") ||
|
370 |
|
|
of_device_is_compatible(np, "pciclass,070002"))
|
371 |
|
|
pci = np;
|
372 |
|
|
else if (of_device_is_compatible(parent, "pciclass,0700") ||
|
373 |
|
|
of_device_is_compatible(parent, "pciclass,070002"))
|
374 |
|
|
pci = parent;
|
375 |
|
|
else {
|
376 |
|
|
of_node_put(parent);
|
377 |
|
|
continue;
|
378 |
|
|
}
|
379 |
|
|
index = add_legacy_pci_port(np, pci);
|
380 |
|
|
if (index >= 0 && np == stdout)
|
381 |
|
|
legacy_serial_console = index;
|
382 |
|
|
of_node_put(parent);
|
383 |
|
|
}
|
384 |
|
|
#endif
|
385 |
|
|
|
386 |
|
|
DBG("legacy_serial_console = %d\n", legacy_serial_console);
|
387 |
|
|
if (legacy_serial_console >= 0)
|
388 |
|
|
setup_legacy_serial_console(legacy_serial_console);
|
389 |
|
|
DBG(" <- find_legacy_serial_port()\n");
|
390 |
|
|
}
|
391 |
|
|
|
392 |
|
|
static struct platform_device serial_device = {
|
393 |
|
|
.name = "serial8250",
|
394 |
|
|
.id = PLAT8250_DEV_PLATFORM,
|
395 |
|
|
.dev = {
|
396 |
|
|
.platform_data = legacy_serial_ports,
|
397 |
|
|
},
|
398 |
|
|
};
|
399 |
|
|
|
400 |
|
|
static void __init fixup_port_irq(int index,
|
401 |
|
|
struct device_node *np,
|
402 |
|
|
struct plat_serial8250_port *port)
|
403 |
|
|
{
|
404 |
|
|
unsigned int virq;
|
405 |
|
|
|
406 |
|
|
DBG("fixup_port_irq(%d)\n", index);
|
407 |
|
|
|
408 |
|
|
virq = irq_of_parse_and_map(np, 0);
|
409 |
|
|
if (virq == NO_IRQ && legacy_serial_infos[index].irq_check_parent) {
|
410 |
|
|
np = of_get_parent(np);
|
411 |
|
|
if (np == NULL)
|
412 |
|
|
return;
|
413 |
|
|
virq = irq_of_parse_and_map(np, 0);
|
414 |
|
|
of_node_put(np);
|
415 |
|
|
}
|
416 |
|
|
if (virq == NO_IRQ)
|
417 |
|
|
return;
|
418 |
|
|
|
419 |
|
|
port->irq = virq;
|
420 |
|
|
}
|
421 |
|
|
|
422 |
|
|
static void __init fixup_port_pio(int index,
|
423 |
|
|
struct device_node *np,
|
424 |
|
|
struct plat_serial8250_port *port)
|
425 |
|
|
{
|
426 |
|
|
#ifdef CONFIG_PCI
|
427 |
|
|
struct pci_controller *hose;
|
428 |
|
|
|
429 |
|
|
DBG("fixup_port_pio(%d)\n", index);
|
430 |
|
|
|
431 |
|
|
hose = pci_find_hose_for_OF_device(np);
|
432 |
|
|
if (hose) {
|
433 |
|
|
unsigned long offset = (unsigned long)hose->io_base_virt -
|
434 |
|
|
#ifdef CONFIG_PPC64
|
435 |
|
|
pci_io_base;
|
436 |
|
|
#else
|
437 |
|
|
isa_io_base;
|
438 |
|
|
#endif
|
439 |
|
|
DBG("port %d, IO %lx -> %lx\n",
|
440 |
|
|
index, port->iobase, port->iobase + offset);
|
441 |
|
|
port->iobase += offset;
|
442 |
|
|
}
|
443 |
|
|
#endif
|
444 |
|
|
}
|
445 |
|
|
|
446 |
|
|
static void __init fixup_port_mmio(int index,
|
447 |
|
|
struct device_node *np,
|
448 |
|
|
struct plat_serial8250_port *port)
|
449 |
|
|
{
|
450 |
|
|
DBG("fixup_port_mmio(%d)\n", index);
|
451 |
|
|
|
452 |
|
|
port->membase = ioremap(port->mapbase, 0x100);
|
453 |
|
|
}
|
454 |
|
|
|
455 |
|
|
/*
|
456 |
|
|
* This is called as an arch initcall, hopefully before the PCI bus is
|
457 |
|
|
* probed and/or the 8250 driver loaded since we need to register our
|
458 |
|
|
* platform devices before 8250 PCI ones are detected as some of them
|
459 |
|
|
* must properly "override" the platform ones.
|
460 |
|
|
*
|
461 |
|
|
* This function fixes up the interrupt value for platform ports as it
|
462 |
|
|
* couldn't be done earlier before interrupt maps have been parsed. It
|
463 |
|
|
* also "corrects" the IO address for PIO ports for the same reason,
|
464 |
|
|
* since earlier, the PHBs virtual IO space wasn't assigned yet. It then
|
465 |
|
|
* registers all those platform ports for use by the 8250 driver when it
|
466 |
|
|
* finally loads.
|
467 |
|
|
*/
|
468 |
|
|
static int __init serial_dev_init(void)
|
469 |
|
|
{
|
470 |
|
|
int i;
|
471 |
|
|
|
472 |
|
|
if (legacy_serial_count == 0)
|
473 |
|
|
return -ENODEV;
|
474 |
|
|
|
475 |
|
|
/*
|
476 |
|
|
* Before we register the platfrom serial devices, we need
|
477 |
|
|
* to fixup their interrutps and their IO ports.
|
478 |
|
|
*/
|
479 |
|
|
DBG("Fixing serial ports interrupts and IO ports ...\n");
|
480 |
|
|
|
481 |
|
|
for (i = 0; i < legacy_serial_count; i++) {
|
482 |
|
|
struct plat_serial8250_port *port = &legacy_serial_ports[i];
|
483 |
|
|
struct device_node *np = legacy_serial_infos[i].np;
|
484 |
|
|
|
485 |
|
|
if (port->irq == NO_IRQ)
|
486 |
|
|
fixup_port_irq(i, np, port);
|
487 |
|
|
if (port->iotype == UPIO_PORT)
|
488 |
|
|
fixup_port_pio(i, np, port);
|
489 |
|
|
if ((port->iotype == UPIO_MEM) || (port->iotype == UPIO_TSI))
|
490 |
|
|
fixup_port_mmio(i, np, port);
|
491 |
|
|
}
|
492 |
|
|
|
493 |
|
|
DBG("Registering platform serial ports\n");
|
494 |
|
|
|
495 |
|
|
return platform_device_register(&serial_device);
|
496 |
|
|
}
|
497 |
|
|
device_initcall(serial_dev_init);
|
498 |
|
|
|
499 |
|
|
|
500 |
|
|
/*
|
501 |
|
|
* This is called very early, as part of console_init() (typically just after
|
502 |
|
|
* time_init()). This function is respondible for trying to find a good
|
503 |
|
|
* default console on serial ports. It tries to match the open firmware
|
504 |
|
|
* default output with one of the available serial console drivers, either
|
505 |
|
|
* one of the platform serial ports that have been probed earlier by
|
506 |
|
|
* find_legacy_serial_ports() or some more platform specific ones.
|
507 |
|
|
*/
|
508 |
|
|
static int __init check_legacy_serial_console(void)
|
509 |
|
|
{
|
510 |
|
|
struct device_node *prom_stdout = NULL;
|
511 |
|
|
int speed = 0, offset = 0;
|
512 |
|
|
const char *name;
|
513 |
|
|
const u32 *spd;
|
514 |
|
|
|
515 |
|
|
DBG(" -> check_legacy_serial_console()\n");
|
516 |
|
|
|
517 |
|
|
/* The user has requested a console so this is already set up. */
|
518 |
|
|
if (strstr(boot_command_line, "console=")) {
|
519 |
|
|
DBG(" console was specified !\n");
|
520 |
|
|
return -EBUSY;
|
521 |
|
|
}
|
522 |
|
|
|
523 |
|
|
if (!of_chosen) {
|
524 |
|
|
DBG(" of_chosen is NULL !\n");
|
525 |
|
|
return -ENODEV;
|
526 |
|
|
}
|
527 |
|
|
|
528 |
|
|
if (legacy_serial_console < 0) {
|
529 |
|
|
DBG(" legacy_serial_console not found !\n");
|
530 |
|
|
return -ENODEV;
|
531 |
|
|
}
|
532 |
|
|
/* We are getting a weird phandle from OF ... */
|
533 |
|
|
/* ... So use the full path instead */
|
534 |
|
|
name = of_get_property(of_chosen, "linux,stdout-path", NULL);
|
535 |
|
|
if (name == NULL) {
|
536 |
|
|
DBG(" no linux,stdout-path !\n");
|
537 |
|
|
return -ENODEV;
|
538 |
|
|
}
|
539 |
|
|
prom_stdout = of_find_node_by_path(name);
|
540 |
|
|
if (!prom_stdout) {
|
541 |
|
|
DBG(" can't find stdout package %s !\n", name);
|
542 |
|
|
return -ENODEV;
|
543 |
|
|
}
|
544 |
|
|
DBG("stdout is %s\n", prom_stdout->full_name);
|
545 |
|
|
|
546 |
|
|
name = of_get_property(prom_stdout, "name", NULL);
|
547 |
|
|
if (!name) {
|
548 |
|
|
DBG(" stdout package has no name !\n");
|
549 |
|
|
goto not_found;
|
550 |
|
|
}
|
551 |
|
|
spd = of_get_property(prom_stdout, "current-speed", NULL);
|
552 |
|
|
if (spd)
|
553 |
|
|
speed = *spd;
|
554 |
|
|
|
555 |
|
|
if (0)
|
556 |
|
|
;
|
557 |
|
|
#ifdef CONFIG_SERIAL_8250_CONSOLE
|
558 |
|
|
else if (strcmp(name, "serial") == 0) {
|
559 |
|
|
int i;
|
560 |
|
|
/* Look for it in probed array */
|
561 |
|
|
for (i = 0; i < legacy_serial_count; i++) {
|
562 |
|
|
if (prom_stdout != legacy_serial_infos[i].np)
|
563 |
|
|
continue;
|
564 |
|
|
offset = i;
|
565 |
|
|
speed = legacy_serial_infos[i].speed;
|
566 |
|
|
break;
|
567 |
|
|
}
|
568 |
|
|
if (i >= legacy_serial_count)
|
569 |
|
|
goto not_found;
|
570 |
|
|
}
|
571 |
|
|
#endif /* CONFIG_SERIAL_8250_CONSOLE */
|
572 |
|
|
#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
|
573 |
|
|
else if (strcmp(name, "ch-a") == 0)
|
574 |
|
|
offset = 0;
|
575 |
|
|
else if (strcmp(name, "ch-b") == 0)
|
576 |
|
|
offset = 1;
|
577 |
|
|
#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
|
578 |
|
|
else
|
579 |
|
|
goto not_found;
|
580 |
|
|
of_node_put(prom_stdout);
|
581 |
|
|
|
582 |
|
|
DBG("Found serial console at ttyS%d\n", offset);
|
583 |
|
|
|
584 |
|
|
if (speed) {
|
585 |
|
|
static char __initdata opt[16];
|
586 |
|
|
sprintf(opt, "%d", speed);
|
587 |
|
|
return add_preferred_console("ttyS", offset, opt);
|
588 |
|
|
} else
|
589 |
|
|
return add_preferred_console("ttyS", offset, NULL);
|
590 |
|
|
|
591 |
|
|
not_found:
|
592 |
|
|
DBG("No preferred console found !\n");
|
593 |
|
|
of_node_put(prom_stdout);
|
594 |
|
|
return -ENODEV;
|
595 |
|
|
}
|
596 |
|
|
console_initcall(check_legacy_serial_console);
|
597 |
|
|
|