| /* |
| frpw.c (c) 1996-8 Grant R. Guenther <grant@torque.net> |
| Under the terms of the GNU General Public License |
| |
| frpw.c is a low-level protocol driver for the Freecom "Power" |
| parallel port IDE adapter. |
| |
| Some applications of this adapter may require a "printer" reset |
| prior to loading the driver. This can be done by loading and |
| unloading the "lp" driver, or it can be done by this driver |
| if you define FRPW_HARD_RESET. The latter is not recommended |
| as it may upset devices on other ports. |
| |
| */ |
| |
| /* Changes: |
| |
| 1.01 GRG 1998.05.06 init_proto, release_proto |
| fix chip detect |
| added EPP-16 and EPP-32 |
| 1.02 GRG 1998.09.23 added hard reset to initialisation process |
| 1.03 GRG 1998.12.14 made hard reset conditional |
| |
| */ |
| |
| #define FRPW_VERSION "1.03" |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/wait.h> |
| #include <asm/io.h> |
| |
| #include "paride.h" |
| |
| #define cec4 w2(0xc);w2(0xe);w2(0xe);w2(0xc);w2(4);w2(4);w2(4); |
| #define j44(l,h) (((l>>4)&0x0f)|(h&0xf0)) |
| |
| /* cont = 0 - access the IDE register file |
| cont = 1 - access the IDE command set |
| */ |
| |
| static int cont_map[2] = { 0x08, 0x10 }; |
| |
| static int frpw_read_regr( PIA *pi, int cont, int regr ) |
| |
| { int h,l,r; |
| |
| r = regr + cont_map[cont]; |
| |
| w2(4); |
| w0(r); cec4; |
| w2(6); l = r1(); |
| w2(4); h = r1(); |
| w2(4); |
| |
| return j44(l,h); |
| |
| } |
| |
| static void frpw_write_regr( PIA *pi, int cont, int regr, int val) |
| |
| { int r; |
| |
| r = regr + cont_map[cont]; |
| |
| w2(4); w0(r); cec4; |
| w0(val); |
| w2(5);w2(7);w2(5);w2(4); |
| } |
| |
| static void frpw_read_block_int( PIA *pi, char * buf, int count, int regr ) |
| |
| { int h, l, k, ph; |
| |
| switch(pi->mode) { |
| |
| case 0: w2(4); w0(regr); cec4; |
| for (k=0;k<count;k++) { |
| w2(6); l = r1(); |
| w2(4); h = r1(); |
| buf[k] = j44(l,h); |
| } |
| w2(4); |
| break; |
| |
| case 1: ph = 2; |
| w2(4); w0(regr + 0xc0); cec4; |
| w0(0xff); |
| for (k=0;k<count;k++) { |
| w2(0xa4 + ph); |
| buf[k] = r0(); |
| ph = 2 - ph; |
| } |
| w2(0xac); w2(0xa4); w2(4); |
| break; |
| |
| case 2: w2(4); w0(regr + 0x80); cec4; |
| for (k=0;k<count;k++) buf[k] = r4(); |
| w2(0xac); w2(0xa4); |
| w2(4); |
| break; |
| |
| case 3: w2(4); w0(regr + 0x80); cec4; |
| for (k=0;k<count-2;k++) buf[k] = r4(); |
| w2(0xac); w2(0xa4); |
| buf[count-2] = r4(); |
| buf[count-1] = r4(); |
| w2(4); |
| break; |
| |
| case 4: w2(4); w0(regr + 0x80); cec4; |
| for (k=0;k<(count/2)-1;k++) ((u16 *)buf)[k] = r4w(); |
| w2(0xac); w2(0xa4); |
| buf[count-2] = r4(); |
| buf[count-1] = r4(); |
| w2(4); |
| break; |
| |
| case 5: w2(4); w0(regr + 0x80); cec4; |
| for (k=0;k<(count/4)-1;k++) ((u32 *)buf)[k] = r4l(); |
| buf[count-4] = r4(); |
| buf[count-3] = r4(); |
| w2(0xac); w2(0xa4); |
| buf[count-2] = r4(); |
| buf[count-1] = r4(); |
| w2(4); |
| break; |
| |
| } |
| } |
| |
| static void frpw_read_block( PIA *pi, char * buf, int count) |
| |
| { frpw_read_block_int(pi,buf,count,0x08); |
| } |
| |
| static void frpw_write_block( PIA *pi, char * buf, int count ) |
| |
| { int k; |
| |
| switch(pi->mode) { |
| |
| case 0: |
| case 1: |
| case 2: w2(4); w0(8); cec4; w2(5); |
| for (k=0;k<count;k++) { |
| w0(buf[k]); |
| w2(7);w2(5); |
| } |
| w2(4); |
| break; |
| |
| case 3: w2(4); w0(0xc8); cec4; w2(5); |
| for (k=0;k<count;k++) w4(buf[k]); |
| w2(4); |
| break; |
| |
| case 4: w2(4); w0(0xc8); cec4; w2(5); |
| for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]); |
| w2(4); |
| break; |
| |
| case 5: w2(4); w0(0xc8); cec4; w2(5); |
| for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]); |
| w2(4); |
| break; |
| } |
| } |
| |
| static void frpw_connect ( PIA *pi ) |
| |
| { pi->saved_r0 = r0(); |
| pi->saved_r2 = r2(); |
| w2(4); |
| } |
| |
| static void frpw_disconnect ( PIA *pi ) |
| |
| { w2(4); w0(0x20); cec4; |
| w0(pi->saved_r0); |
| w2(pi->saved_r2); |
| } |
| |
| /* Stub logic to see if PNP string is available - used to distinguish |
| between the Xilinx and ASIC implementations of the Freecom adapter. |
| */ |
| |
| static int frpw_test_pnp ( PIA *pi ) |
| |
| /* returns chip_type: 0 = Xilinx, 1 = ASIC */ |
| |
| { int olddelay, a, b; |
| |
| #ifdef FRPW_HARD_RESET |
| w0(0); w2(8); udelay(50); w2(0xc); /* parallel bus reset */ |
| mdelay(1500); |
| #endif |
| |
| olddelay = pi->delay; |
| pi->delay = 10; |
| |
| pi->saved_r0 = r0(); |
| pi->saved_r2 = r2(); |
| |
| w2(4); w0(4); w2(6); w2(7); |
| a = r1() & 0xff; w2(4); b = r1() & 0xff; |
| w2(0xc); w2(0xe); w2(4); |
| |
| pi->delay = olddelay; |
| w0(pi->saved_r0); |
| w2(pi->saved_r2); |
| |
| return ((~a&0x40) && (b&0x40)); |
| } |
| |
| /* We use the pi->private to remember the result of the PNP test. |
| To make this work, private = port*2 + chip. Yes, I know it's |
| a hack :-( |
| */ |
| |
| static int frpw_test_proto( PIA *pi, char * scratch, int verbose ) |
| |
| { int j, k, r; |
| int e[2] = {0,0}; |
| |
| if ((pi->private>>1) != pi->port) |
| pi->private = frpw_test_pnp(pi) + 2*pi->port; |
| |
| if (((pi->private%2) == 0) && (pi->mode > 2)) { |
| if (verbose) |
| printk("%s: frpw: Xilinx does not support mode %d\n", |
| pi->device, pi->mode); |
| return 1; |
| } |
| |
| if (((pi->private%2) == 1) && (pi->mode == 2)) { |
| if (verbose) |
| printk("%s: frpw: ASIC does not support mode 2\n", |
| pi->device); |
| return 1; |
| } |
| |
| frpw_connect(pi); |
| for (j=0;j<2;j++) { |
| frpw_write_regr(pi,0,6,0xa0+j*0x10); |
| for (k=0;k<256;k++) { |
| frpw_write_regr(pi,0,2,k^0xaa); |
| frpw_write_regr(pi,0,3,k^0x55); |
| if (frpw_read_regr(pi,0,2) != (k^0xaa)) e[j]++; |
| } |
| } |
| frpw_disconnect(pi); |
| |
| frpw_connect(pi); |
| frpw_read_block_int(pi,scratch,512,0x10); |
| r = 0; |
| for (k=0;k<128;k++) if (scratch[k] != k) r++; |
| frpw_disconnect(pi); |
| |
| if (verbose) { |
| printk("%s: frpw: port 0x%x, chip %ld, mode %d, test=(%d,%d,%d)\n", |
| pi->device,pi->port,(pi->private%2),pi->mode,e[0],e[1],r); |
| } |
| |
| return (r || (e[0] && e[1])); |
| } |
| |
| |
| static void frpw_log_adapter( PIA *pi, char * scratch, int verbose ) |
| |
| { char *mode_string[6] = {"4-bit","8-bit","EPP", |
| "EPP-8","EPP-16","EPP-32"}; |
| |
| printk("%s: frpw %s, Freecom (%s) adapter at 0x%x, ", pi->device, |
| FRPW_VERSION,((pi->private%2) == 0)?"Xilinx":"ASIC",pi->port); |
| printk("mode %d (%s), delay %d\n",pi->mode, |
| mode_string[pi->mode],pi->delay); |
| |
| } |
| |
| static struct pi_protocol frpw = { |
| .owner = THIS_MODULE, |
| .name = "frpw", |
| .max_mode = 6, |
| .epp_first = 2, |
| .default_delay = 2, |
| .max_units = 1, |
| .write_regr = frpw_write_regr, |
| .read_regr = frpw_read_regr, |
| .write_block = frpw_write_block, |
| .read_block = frpw_read_block, |
| .connect = frpw_connect, |
| .disconnect = frpw_disconnect, |
| .test_proto = frpw_test_proto, |
| .log_adapter = frpw_log_adapter, |
| }; |
| |
| static int __init frpw_init(void) |
| { |
| return paride_register(&frpw); |
| } |
| |
| static void __exit frpw_exit(void) |
| { |
| paride_unregister(&frpw); |
| } |
| |
| MODULE_LICENSE("GPL"); |
| module_init(frpw_init) |
| module_exit(frpw_exit) |
