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-rw-r--r--roms/openbios/drivers/escc.c584
1 files changed, 584 insertions, 0 deletions
diff --git a/roms/openbios/drivers/escc.c b/roms/openbios/drivers/escc.c
new file mode 100644
index 000000000..0f0d43a36
--- /dev/null
+++ b/roms/openbios/drivers/escc.c
@@ -0,0 +1,584 @@
+#include "config.h"
+#include "libopenbios/bindings.h"
+#include "libc/byteorder.h"
+#include "libc/vsprintf.h"
+#include "drivers/drivers.h"
+#include "libopenbios/ofmem.h"
+
+#include "escc.h"
+
+/* ******************************************************************
+ * serial console functions
+ * ****************************************************************** */
+
+static volatile unsigned char *escc_serial_dev;
+
+#define CTRL(addr) (*(volatile unsigned char *)(uintptr_t)(addr))
+#ifdef CONFIG_DRIVER_ESCC_SUN
+#define DATA(addr) (*(volatile unsigned char *)(uintptr_t)(addr + 2))
+#else
+#define DATA(addr) (*(volatile unsigned char *)(uintptr_t)(addr + 16))
+#endif
+
+/* Conversion routines to/from brg time constants from/to bits
+ * per second.
+ */
+#define BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 * (bps))) - 2)
+
+#ifdef CONFIG_DRIVER_ESCC_SUN
+#define ESCC_CLOCK 4915200 /* Zilog input clock rate. */
+#else
+#define ESCC_CLOCK 3686400
+#endif
+#define ESCC_CLOCK_DIVISOR 16 /* Divisor this driver uses. */
+
+/* Write Register 3 */
+#define RxENAB 0x1 /* Rx Enable */
+#define Rx8 0xc0 /* Rx 8 Bits/Character */
+
+/* Write Register 4 */
+#define SB1 0x4 /* 1 stop bit/char */
+#define X16CLK 0x40 /* x16 clock mode */
+
+/* Write Register 5 */
+#define RTS 0x2 /* RTS */
+#define TxENAB 0x8 /* Tx Enable */
+#define Tx8 0x60 /* Tx 8 bits/character */
+#define DTR 0x80 /* DTR */
+
+/* Write Register 9 */
+#define SW_CHAN_RESET_B 0x40 /* Software reset channel B */
+
+/* Write Register 14 (Misc control bits) */
+#define BRENAB 1 /* Baud rate generator enable */
+#define BRSRC 2 /* Baud rate generator source */
+
+/* Read Register 0 */
+#define Rx_CH_AV 0x1 /* Rx Character Available */
+#define Tx_BUF_EMP 0x4 /* Tx Buffer empty */
+
+int escc_uart_charav(uintptr_t port)
+{
+ return (CTRL(port) & Rx_CH_AV) != 0;
+}
+
+char escc_uart_getchar(uintptr_t port)
+{
+ while (!escc_uart_charav(port))
+ ;
+ return DATA(port) & 0177;
+}
+
+static void escc_uart_port_putchar(uintptr_t port, unsigned char c)
+{
+ if (!escc_serial_dev)
+ return;
+
+ if (c == '\n')
+ escc_uart_port_putchar(port, '\r');
+ while (!(CTRL(port) & Tx_BUF_EMP))
+ ;
+ DATA(port) = c;
+}
+
+static void uart_init_line(volatile unsigned char *port, unsigned long baud, int index)
+{
+ CTRL(port) = 9; // reg 9
+ CTRL(port) = SW_CHAN_RESET_B << index;
+
+ CTRL(port) = 4; // reg 4
+ CTRL(port) = SB1 | X16CLK; // no parity, async, 1 stop bit, 16x
+ // clock
+
+ baud = BPS_TO_BRG(baud, ESCC_CLOCK / ESCC_CLOCK_DIVISOR);
+
+ CTRL(port) = 12; // reg 12
+ CTRL(port) = baud & 0xff;
+ CTRL(port) = 13; // reg 13
+ CTRL(port) = (baud >> 8) & 0xff;
+ CTRL(port) = 14; // reg 14
+ CTRL(port) = BRSRC | BRENAB;
+
+ CTRL(port) = 3; // reg 3
+ CTRL(port) = RxENAB | Rx8; // enable rx, 8 bits/char
+
+ CTRL(port) = 5; // reg 5
+ CTRL(port) = RTS | TxENAB | Tx8 | DTR; // enable tx, 8 bits/char,
+ // set RTS & DTR
+
+}
+
+int escc_uart_init(phys_addr_t port, unsigned long speed)
+{
+#ifdef CONFIG_DRIVER_ESCC_SUN
+ escc_serial_dev = (unsigned char *)ofmem_map_io(port & ~7ULL, ZS_REGS);
+ escc_serial_dev += port & 7ULL;
+#else
+ escc_serial_dev = (unsigned char *)(uintptr_t)port;
+#endif
+ uart_init_line(escc_serial_dev, speed, 1);
+ return -1;
+}
+
+void escc_uart_putchar(int c)
+{
+ escc_uart_port_putchar((uintptr_t)escc_serial_dev, (unsigned char) (c & 0xff));
+}
+
+void serial_cls(void)
+{
+ escc_uart_putchar(27);
+ escc_uart_putchar('[');
+ escc_uart_putchar('H');
+ escc_uart_putchar(27);
+ escc_uart_putchar('[');
+ escc_uart_putchar('J');
+}
+
+/* ( addr len -- actual ) */
+static void
+escc_port_read(ucell *address)
+{
+ char *addr;
+ int len;
+
+ len = POP();
+ addr = (char *)cell2pointer(POP());
+
+ if (len < 1)
+ printk("escc_read: bad len, addr %p len %x\n", addr, len);
+
+ if (escc_uart_charav(*address)) {
+ *addr = (char)escc_uart_getchar(*address);
+ PUSH(1);
+ } else {
+ PUSH(0);
+ }
+}
+
+/* ( addr len -- actual ) */
+static void
+escc_port_write(ucell *address)
+{
+ unsigned char *addr;
+ int i, len;
+
+ len = POP();
+ addr = (unsigned char *)cell2pointer(POP());
+
+ for (i = 0; i < len; i++) {
+ escc_uart_port_putchar(*address, addr[i]);
+ }
+ PUSH(len);
+}
+
+static void
+escc_port_close(void)
+{
+}
+
+#ifdef CONFIG_DRIVER_ESCC_SUN
+static void
+escc_port_open(ucell *address)
+{
+
+ int len;
+ phandle_t ph;
+ unsigned long *prop;
+ char *args;
+
+ fword("my-self");
+ fword("ihandle>phandle");
+ ph = (phandle_t)POP();
+ prop = (unsigned long *)get_property(ph, "address", &len);
+ *address = *prop;
+ fword("my-args");
+ args = pop_fstr_copy();
+ if (args) {
+ if (args[0] == 'a')
+ *address += 4;
+ //printk("escc_open: address %lx, args %s\n", *address, args);
+ free(args);
+ }
+
+ RET ( -1 );
+}
+
+#else
+
+static void
+escc_port_open(ucell *address)
+{
+ *address = (unsigned long)escc_serial_dev; // XXX
+ RET(-1);
+}
+
+static void
+escc_open(int *idx)
+{
+ RET(-1);
+}
+
+static void
+escc_close(int *idx)
+{
+}
+
+DECLARE_UNNAMED_NODE(escc, 0, sizeof(int *));
+
+NODE_METHODS(escc) = {
+ { "open", escc_open },
+ { "close", escc_close },
+};
+
+#endif
+
+DECLARE_UNNAMED_NODE(escc_port, 0, sizeof(ucell));
+
+NODE_METHODS(escc_port) = {
+ { "open", escc_port_open },
+ { "close", escc_port_close },
+ { "read", escc_port_read },
+ { "write", escc_port_write },
+};
+
+#ifdef CONFIG_DRIVER_ESCC_SUN
+static volatile unsigned char *kbd_dev;
+
+void kbd_init(phys_addr_t base)
+{
+ kbd_dev = (unsigned char *)ofmem_map_io(base, 2 * 4);
+ kbd_dev += 4;
+}
+
+static const unsigned char sunkbd_keycode[128] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 0, 8,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 9,
+ 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']',
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', '\\', 13,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ ' ',
+};
+
+static const unsigned char sunkbd_keycode_shifted[128] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', 0, 8,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 9,
+ 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}',
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '|', 13,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ ' ',
+};
+
+static int shiftstate;
+
+int
+keyboard_dataready(void)
+{
+ return ((kbd_dev[0] & 1) == 1);
+}
+
+unsigned char
+keyboard_readdata(void)
+{
+ volatile unsigned char ch;
+
+ while (!keyboard_dataready()) { }
+
+ do {
+ ch = kbd_dev[2] & 0xff;
+ if (ch == 99)
+ shiftstate |= 1;
+ else if (ch == 110)
+ shiftstate |= 2;
+ else if (ch == 227)
+ shiftstate &= ~1;
+ else if (ch == 238)
+ shiftstate &= ~2;
+ //printk("getch: %d\n", ch);
+ } // If release, wait for key press
+ while ((ch & 0x80) == 0x80 || ch == 238 || ch == 227);
+ //printk("getch rel: %d\n", ch);
+ ch &= 0x7f;
+ if (shiftstate)
+ ch = sunkbd_keycode_shifted[ch];
+ else
+ ch = sunkbd_keycode[ch];
+ //printk("getch xlate: %d\n", ch);
+
+ return ch;
+}
+
+/* ( addr len -- actual ) */
+static void
+escc_read_keyboard(void)
+{
+ unsigned char *addr;
+ int len;
+
+ len = POP();
+ addr = (unsigned char *)POP();
+
+ if (len < 1)
+ printk("escc_read: bad len, addr %p len %x\n", addr, len);
+
+ if (keyboard_dataready()) {
+ *addr = keyboard_readdata();
+ PUSH(1);
+ } else {
+ PUSH(0);
+ }
+}
+
+DECLARE_UNNAMED_NODE(escc_keyboard, 0, sizeof(ucell));
+
+NODE_METHODS(escc_keyboard) = {
+ { "open", escc_port_open },
+ { "close", escc_port_close },
+ { "read", escc_read_keyboard },
+};
+
+void
+ob_zs_init(phys_addr_t base, uint64_t offset, int intr, int slave, int keyboard)
+{
+ char nodebuff[256];
+ phandle_t aliases;
+
+ ob_new_obio_device("zs", "serial");
+
+ ob_reg(base, offset, ZS_REGS, 1);
+
+ PUSH(slave);
+ fword("encode-int");
+ push_str("slave");
+ fword("property");
+
+ if (keyboard) {
+ PUSH(0);
+ PUSH(0);
+ push_str("keyboard");
+ fword("property");
+
+ PUSH(0);
+ PUSH(0);
+ push_str("mouse");
+ fword("property");
+ }
+
+ ob_intr(intr);
+
+ PUSH(0);
+ PUSH(0);
+ push_str("port-a-ignore-cd");
+ fword("property");
+
+ PUSH(0);
+ PUSH(0);
+ push_str("port-b-ignore-cd");
+ fword("property");
+
+ if (keyboard) {
+ BIND_NODE_METHODS(get_cur_dev(), escc_keyboard);
+ } else {
+ BIND_NODE_METHODS(get_cur_dev(), escc_port);
+ }
+
+ fword("finish-device");
+
+ aliases = find_dev("/aliases");
+ if (keyboard) {
+ snprintf(nodebuff, sizeof(nodebuff), "/obio/zs@0,%x",
+ (int)offset & 0xffffffff);
+ set_property(aliases, "keyboard", nodebuff, strlen(nodebuff) + 1);
+ } else {
+ snprintf(nodebuff, sizeof(nodebuff), "/obio/zs@0,%x:a",
+ (int)offset & 0xffffffff);
+ set_property(aliases, "ttya", nodebuff, strlen(nodebuff) + 1);
+
+ snprintf(nodebuff, sizeof(nodebuff), "/obio/zs@0,%x:b",
+ (int)offset & 0xffffffff);
+ set_property(aliases, "ttyb", nodebuff, strlen(nodebuff) + 1);
+
+ }
+}
+
+#else
+
+static void
+escc_add_channel(const char *path, const char *node, phys_addr_t addr,
+ int esnum)
+{
+ char buf[64], tty[32];
+ phandle_t dnode, aliases;
+
+ cell props[10];
+ ucell offset;
+ int index;
+ int legacy;
+
+ int dbdma_offsets[2][2] = {
+ /* ch-b */
+ { 0x6, 0x7 },
+ /* ch-a */
+ { 0x4, 0x5 }
+ };
+
+ int reg_offsets[2][2][3] = {
+ {
+ /* ch-b */
+ { 0x00, 0x10, 0x40 },
+ /* ch-a */
+ { 0x20, 0x30, 0x50 }
+ },{
+ /* legacy ch-b */
+ { 0x0, 0x4, 0x8 },
+ /* legacy ch-a */
+ { 0x2, 0x6, 0xa }
+ }
+ };
+
+ switch (esnum) {
+ case 2: index = 1; legacy = 0; break;
+ case 3: index = 0; legacy = 0; break;
+ case 4: index = 1; legacy = 1; break;
+ case 5: index = 0; legacy = 1; break;
+ default: return;
+ }
+
+ /* add device */
+
+ fword("new-device");
+
+ snprintf(buf, sizeof(buf), "ch-%s", node);
+ push_str(buf);
+ fword("device-name");
+
+ BIND_NODE_METHODS(get_cur_dev(), escc_port);
+
+ /* add aliases */
+
+ if (!legacy) {
+ aliases = find_dev("/aliases");
+
+ snprintf(buf, sizeof(buf), "%s/ch-%s", path, node);
+ OLDWORLD(snprintf(tty, sizeof(tty), "tty%s", node));
+ OLDWORLD(set_property(aliases, tty, buf, strlen(buf) + 1));
+ snprintf(tty, sizeof(tty), "scc%s", node);
+ set_property(aliases, tty, buf, strlen(buf) + 1);
+ }
+ /* add properties */
+
+ dnode = get_cur_dev();
+ set_property(dnode, "device_type", "serial",
+ strlen("serial") + 1);
+
+ snprintf(buf, sizeof(buf), "chrp,es%d", esnum);
+ set_property(dnode, "compatible", buf, 9);
+
+ if (legacy) {
+ offset = IO_ESCC_LEGACY_OFFSET;
+ } else {
+ offset = IO_ESCC_OFFSET;
+ }
+
+ props[0] = offset + reg_offsets[legacy][index][0];
+ props[1] = 0x1;
+ props[2] = offset + reg_offsets[legacy][index][1];
+ props[3] = 0x1;
+ props[4] = offset + reg_offsets[legacy][index][2];
+ props[5] = 0x1;
+ props[6] = 0x8000 + dbdma_offsets[index][0] * 0x100;
+ props[7] = 0x100;
+ props[8] = 0x8000 + dbdma_offsets[index][1] * 0x100;
+ props[9] = 0x100;
+ set_property(dnode, "reg", (char *)&props, 10 * sizeof(cell));
+
+ props[0] = addr + offset + reg_offsets[legacy][index][0];
+ OLDWORLD(set_property(dnode, "AAPL,address",
+ (char *)&props, 1 * sizeof(cell)));
+
+ props[0] = 0x10 - index;
+ OLDWORLD(set_property(dnode, "AAPL,interrupts",
+ (char *)&props, 1 * sizeof(cell)));
+
+ props[0] = (0x24) + index;
+ props[1] = 0x1;
+ props[2] = dbdma_offsets[index][0];
+ props[3] = 0x0;
+ props[4] = dbdma_offsets[index][1];
+ props[5] = 0x0;
+ NEWWORLD(set_property(dnode, "interrupts",
+ (char *)&props, 6 * sizeof(cell)));
+
+ set_int_property(dnode, "slot-names", 0);
+
+ fword("finish-device");
+
+ uart_init_line((unsigned char*)addr + offset + reg_offsets[legacy][index][0],
+ CONFIG_SERIAL_SPEED, index);
+}
+
+void
+escc_init(const char *path, phys_addr_t addr)
+{
+ char buf[64];
+ int props[2];
+ phandle_t dnode;
+
+ fword("new-device");
+
+ push_str("escc");
+ fword("device-name");
+
+ dnode = get_cur_dev();
+ set_int_property(dnode, "#address-cells", 1);
+ props[0] = __cpu_to_be32(IO_ESCC_OFFSET);
+ props[1] = __cpu_to_be32(IO_ESCC_SIZE);
+ set_property(dnode, "reg", (char *)&props, sizeof(props));
+ set_property(dnode, "device_type", "escc",
+ strlen("escc") + 1);
+ set_property(dnode, "compatible", "escc\0CHRP,es0", 14);
+ set_property(dnode, "ranges", "", 0);
+
+ snprintf(buf, sizeof(buf), "%s/escc", path);
+ escc_add_channel(buf, "a", addr, 2);
+ escc_add_channel(buf, "b", addr, 3);
+
+ BIND_NODE_METHODS(dnode, escc);
+ fword("finish-device");
+
+ escc_serial_dev = (unsigned char *)addr + IO_ESCC_OFFSET +
+ (CONFIG_SERIAL_PORT ? 0 : 0x20);
+
+ fword("new-device");
+
+ push_str("escc-legacy");
+ fword("device-name");
+
+ dnode = get_cur_dev();
+ set_int_property(dnode, "#address-cells", 1);
+ props[0] = __cpu_to_be32(IO_ESCC_LEGACY_OFFSET);
+ props[1] = __cpu_to_be32(IO_ESCC_LEGACY_SIZE);
+ set_property(dnode, "reg", (char *)&props, sizeof(props));
+ set_property(dnode, "device_type", "escc-legacy",
+ strlen("escc-legacy") + 1);
+ set_property(dnode, "compatible", "chrp,es1", 9);
+ set_property(dnode, "ranges", "", 0);
+
+ snprintf(buf, sizeof(buf), "%s/escc-legacy", path);
+ escc_add_channel(buf, "a", addr, 4);
+ escc_add_channel(buf, "b", addr, 5);
+
+ BIND_NODE_METHODS(dnode, escc);
+ fword("finish-device");
+}
+#endif