Switch from GPLv2 to GPLv2+

[fw/altos] / src / drivers / ao_m25.c

diff --git a/src/drivers/ao_m25.c b/src/drivers/ao_m25.c
index 9f696acefcb9f16e003672a42eaae5bddc428e6b..b506b0a7c9394ee5bac8fd36ace6a8ea065dfe4f 100644 (file)
--- a/src/drivers/ao_m25.c
+++ b/src/drivers/ao_m25.c
@@ -3,7 +3,8 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -29,6 +30,7 @@ __pdata uint32_t      ao_storage_config;
 /* Storage unit size - device reads and writes must be within blocks of this size. Usually 256 bytes. */
 __pdata uint16_t       ao_storage_unit;
 
+#define M25_DEBUG      0
 /*
  * Each flash chip is arranged in 64kB sectors; the
  * chip cannot erase in units smaller than that.
@@ -81,11 +83,11 @@ __pdata uint16_t    ao_storage_unit;
 
 #if M25_MAX_CHIPS > 1
 static uint8_t ao_m25_size[M25_MAX_CHIPS];     /* number of sectors in each chip */
-static uint8_t ao_m25_pin[M25_MAX_CHIPS];      /* chip select pin for each chip */
+static ao_port_t ao_m25_pin[M25_MAX_CHIPS];    /* chip select pin for each chip */
 static uint8_t ao_m25_numchips;                        /* number of chips detected */
 #endif
 static uint8_t ao_m25_total;                   /* total sectors available */
-static uint8_t ao_m25_wip;                     /* write in progress */
+static ao_port_t ao_m25_wip;                   /* write in progress */
 
 static __xdata uint8_t ao_m25_mutex;
 
@@ -111,7 +113,7 @@ static __xdata uint8_t      ao_m25_instruction[4];
  * Block until the specified chip is done writing
  */
 static void
-ao_m25_wait_wip(uint8_t cs)
+ao_m25_wait_wip(ao_port_t cs)
 {
        if (ao_m25_wip & cs) {
                M25_SELECT(cs);
@@ -131,7 +133,7 @@ ao_m25_wait_wip(uint8_t cs)
  * so that future operations will block until the WIP bit goes off
  */
 static void
-ao_m25_write_enable(uint8_t cs)
+ao_m25_write_enable(ao_port_t cs)
 {
        M25_SELECT(cs);
        ao_m25_instruction[0] = M25_WREN;
@@ -145,7 +147,7 @@ ao_m25_write_enable(uint8_t cs)
  * Returns the number of 64kB sectors
  */
 static uint8_t
-ao_m25_read_capacity(uint8_t cs)
+ao_m25_read_capacity(ao_port_t cs)
 {
        uint8_t capacity;
        M25_SELECT(cs);
@@ -165,12 +167,13 @@ ao_m25_read_capacity(uint8_t cs)
        return 1 << (capacity - 0x10);
 }
 
-static uint8_t
+static ao_port_t
 ao_m25_set_address(uint32_t pos)
 {
-       uint8_t chip;
+       ao_port_t       mask;
 #if M25_MAX_CHIPS > 1
        uint8_t size;
+       uint8_t         chip;
 
        for (chip = 0; chip < ao_m25_numchips; chip++) {
                size = ao_m25_size[chip];
@@ -181,16 +184,16 @@ ao_m25_set_address(uint32_t pos)
        if (chip == ao_m25_numchips)
                return 0xff;
 
-       chip = ao_m25_pin[chip];
+       mask = ao_m25_pin[chip];
 #else
-       chip = AO_M25_SPI_CS_MASK;
+       mask = AO_M25_SPI_CS_MASK;
 #endif
-       ao_m25_wait_wip(chip);
+       ao_m25_wait_wip(mask);
 
        ao_m25_instruction[1] = pos >> 16;
        ao_m25_instruction[2] = pos >> 8;
        ao_m25_instruction[3] = pos;
-       return chip;
+       return mask;
 }
 
 /*
@@ -238,7 +241,7 @@ ao_m25_scan(void)
 uint8_t
 ao_storage_erase(uint32_t pos) __reentrant
 {
-       uint8_t cs;
+       ao_port_t       cs;
 
        if (pos >= ao_storage_total || pos + ao_storage_block > ao_storage_total)
                return 0;
@@ -248,7 +251,6 @@ ao_storage_erase(uint32_t pos) __reentrant
 
        cs = ao_m25_set_address(pos);
 
-       ao_m25_wait_wip(cs);
        ao_m25_write_enable(cs);
 
        ao_m25_instruction[0] = M25_SE;
@@ -267,7 +269,7 @@ ao_storage_erase(uint32_t pos) __reentrant
 uint8_t
 ao_storage_device_write(uint32_t pos, __xdata void *d, uint16_t len) __reentrant
 {
-       uint8_t cs;
+       ao_port_t       cs;
 
        if (pos >= ao_storage_total || pos + len > ao_storage_total)
                return 0;
@@ -294,7 +296,7 @@ ao_storage_device_write(uint32_t pos, __xdata void *d, uint16_t len) __reentrant
 uint8_t
 ao_storage_device_read(uint32_t pos, __xdata void *d, uint16_t len) __reentrant
 {
-       uint8_t cs;
+       ao_port_t       cs;
 
        if (pos >= ao_storage_total || pos + len > ao_storage_total)
                return 0;
@@ -330,7 +332,9 @@ ao_storage_setup(void)
 void
 ao_storage_device_info(void) __reentrant
 {
-       uint8_t cs;
+#if M25_DEBUG
+       ao_port_t       cs;
+#endif
 #if M25_MAX_CHIPS > 1
        uint8_t chip;
 #endif
@@ -348,6 +352,7 @@ ao_storage_device_info(void) __reentrant
        printf ("Detected chips 1 size %d\n", ao_m25_total);
 #endif
 
+#if M25_DEBUG
        printf ("Available chips:\n");
        for (cs = 1; cs != 0; cs <<= 1) {
                if ((AO_M25_SPI_CS_MASK & cs) == 0)
@@ -368,6 +373,7 @@ ao_storage_device_info(void) __reentrant
                        ao_m25_instruction[M25_UID_OFFSET]);
                ao_mutex_put(&ao_m25_mutex);
        }
+#endif
 }
 
 void