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Tuesday, September 8th, 2009 at 1:38:34pm MDT 

  1. Index: firmware/target/arm/as3525/sansa-e200v2/lcd-e200v2.c
  2. ===================================================================
  3. --- firmware/target/arm/as3525/sansa-e200v2/lcd-e200v2.c        (revision 22658)
  4. +++ firmware/target/arm/as3525/sansa-e200v2/lcd-e200v2.c        (working copy)
  5. @@ -39,6 +39,7 @@
  6.   * (see lcd_button_support()), but that must not happen while the lcd is
  7.   * updating so block lcd_button_support the during updates */
  8.  static volatile bool lcd_busy = false;
  9. +static volatile unsigned short int dbop_input = 0xFFFF;
  10.  
  11.  /* register defines */
  12.  #define R_START_OSC             0x00
  13. @@ -98,6 +99,8 @@
  14.  #define R_DISP_CONTROL_REV    0x0000
  15.  static unsigned short r_disp_control_rev = R_DISP_CONTROL_NORMAL;
  16.  
  17. +static unsigned short lcd_dbop_read(void);
  18. +
  19.  /* TODO: Implement this function */
  20.  static void lcd_delay(int x)
  21.  {
  22. @@ -502,9 +505,13 @@
  23.      if (!display_on)
  24.          return;
  25.  
  26. +    lcd_busy = true;
  27. +
  28. +    /* do a DBOP read before doing a possibly length LCD write */
  29. +    dbop_input = lcd_dbop_read();
  30. +
  31.      lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
  32.  
  33. -    lcd_busy = true;
  34.      /* Set start position and window */
  35.      lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
  36.  
  37. @@ -544,8 +551,12 @@
  38.      if (y >= ymax)
  39.          return; /* nothing left to do */
  40.  
  41. +    lcd_busy = true;
  42. +   
  43. +    /* do a DBOP read before doing a possibly length LCD write */
  44. +    dbop_input = lcd_dbop_read();
  45. +
  46.      lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
  47. -    lcd_busy = true;
  48.      lcd_window(x, y, xmax, ymax);
  49.      lcd_write_cmd(R_WRITE_DATA_2_GRAM);
  50.  
  51. @@ -561,21 +572,43 @@
  52.      lcd_busy = false;
  53.  } /* lcd_update_rect */
  54.  
  55. -/* writes one red pixel outside the visible area, needed for correct
  56. - * dbop reads */
  57. -bool lcd_button_support(void)
  58. +
  59. +static unsigned short lcd_dbop_read(void)
  60.  {
  61. -    fb_data data = (0xf<<12);
  62. +    unsigned int dbop_ctrl_old = DBOP_CTRL;
  63. +    unsigned int dbop_timpol23_old = DBOP_TIMPOL_23;
  64. +    unsigned int value;
  65.  
  66. -    if (lcd_busy)
  67. -        return false;
  68. +    /* make sure that the DBOP FIFO is empty */
  69. +    while ((DBOP_STAT & (1<<10)) == 0);
  70.  
  71. -    lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
  72. -    /* Set start position and window */
  73. -    lcd_window(LCD_WIDTH+1, LCD_HEIGHT+1, LCD_WIDTH+2, LCD_HEIGHT+2);
  74. +    /* write DBOP_DOUT to pre-charge DBOP data lines with a high level */
  75. +    DBOP_TIMPOL_23 = 0xe167e167;    /* no strobe towards lcd */
  76. +    DBOP_CTRL = (1 << 16) |         /* enw=1 (enable write) */
  77. +                (1 << 12);          /* ow=1 (16-bit data width) */
  78. +    DBOP_DOUT = 0xFFFF;             /* all pins high */
  79. +    while ((DBOP_STAT & (1<<10)) == 0);
  80.  
  81. -    lcd_write_cmd(R_WRITE_DATA_2_GRAM);
  82. +    /* perform a DBOP read */
  83. +    DBOP_CTRL = (1 << 15) |         /* strd=1 (start read) */
  84. +                (1 << 12) |         /* ow=1 (16-bit data width) */
  85. +                (31 << 0);          /* rs_t=31 (read DBOP at end of cycle) */
  86. +    while ((DBOP_STAT & (1<<16)) == 0);
  87. +    value = DBOP_DIN;
  88.  
  89. -    lcd_write_single_data16(data);
  90. -    return true;
  91. +    /* restore previous values */
  92. +    DBOP_TIMPOL_23 = dbop_timpol23_old;
  93. +    DBOP_CTRL = dbop_ctrl_old;
  94. +
  95. +    return value;
  96.  }
  97. +
  98. +/* get the DBOP input value, either directly or cached if DBOP is busy */
  99. +unsigned short int lcd_dbop_input(void)
  100. +{
  101. +    if (!lcd_busy) {
  102. +        dbop_input = lcd_dbop_read();
  103. +    }
  104. +    return dbop_input;
  105. +}
  106. +
  107. Index: firmware/target/arm/as3525/kernel-as3525.c
  108. ===================================================================
  109. --- firmware/target/arm/as3525/kernel-as3525.c  (revision 22658)
  110. +++ firmware/target/arm/as3525/kernel-as3525.c  (working copy)
  111. @@ -24,40 +24,14 @@
  112.  #include "panic.h"
  113.  #include "timer.h"
  114.  
  115. -#ifdef HAVE_SCROLLWHEEL
  116. -/* let the timer interrupt twice as often for the scrollwheel polling */
  117. -#define KERNEL_TIMER_FREQ (TIMER_FREQ/2)
  118. -#else
  119.  #define KERNEL_TIMER_FREQ TIMER_FREQ
  120. -#endif
  121.  
  122. -#ifdef HAVE_SCROLLWHEEL
  123. -#include "button-target.h"
  124. -/* The scrollwheel is polled every 5 ms (the tick tasks only every 10) */
  125. -static int poll_scrollwheel = 0;
  126. -
  127.  void INT_TIMER2(void)
  128.  {
  129. -    if (!poll_scrollwheel)
  130. -        call_tick_tasks();      /* Run through the list of tick tasks
  131. -                                 * (that includes reading the scrollwheel) */
  132. -    else
  133. -    {
  134. -        if (!button_hold())
  135. -            button_read_dbop(); /* Read the scrollwheel */
  136. -    }
  137. -
  138. -    poll_scrollwheel ^= 1;
  139. -    TIMER2_INTCLR = 0;  /* clear interrupt */
  140. -}
  141. -#else
  142. -void INT_TIMER2(void)
  143. -{
  144.      call_tick_tasks();  /* Run through the list of tick tasks */
  145.  
  146.      TIMER2_INTCLR = 0;  /* clear interrupt */
  147.  }
  148. -#endif
  149.  
  150.  void tick_start(unsigned int interval_in_ms)
  151.  {
  152. Index: firmware/target/arm/as3525/button-e200v2-fuze.c
  153. ===================================================================
  154. --- firmware/target/arm/as3525/button-e200v2-fuze.c     (revision 22658)
  155. +++ firmware/target/arm/as3525/button-e200v2-fuze.c     (working copy)
  156. @@ -32,7 +32,6 @@
  157.  #define WHEEL_COUNTER_DIV       4
  158.  #define ACCEL_INCREMENT         2
  159.  #define ACCEL_SHIFT             2
  160. -#define BUTTON_DELAY            60
  161.  #endif
  162.  
  163.  #ifdef SANSA_E200V2
  164. @@ -41,12 +40,6 @@
  165.  #define WHEEL_COUNTER_DIV       2
  166.  #define ACCEL_INCREMENT         3
  167.  #define ACCEL_SHIFT             1
  168. -#define BUTTON_DELAY            20
  169. -
  170. -/* read_missed is true if buttons could not
  171. - * be read (see lcd_button_support) */
  172. -static bool read_missed              = false;
  173. -
  174.  #endif
  175.  
  176.  /* Buttons */
  177. @@ -57,19 +50,18 @@
  178.  static unsigned short _dbop_din    = BUTTON_NONE;
  179.  
  180.  /* in the lcd driver */
  181. -extern bool lcd_button_support(void);
  182. +extern unsigned short int lcd_dbop_input(void);
  183.  
  184.  void button_init_device(void)
  185.  {
  186. -    GPIOA_DIR |= (1<<1);       
  187. +    GPIOA_DIR |= (1<<1);
  188.      GPIOA_PIN(1) = (1<<1);
  189.  }
  190.  
  191.  #if !defined(BOOTLOADER) && defined(HAVE_SCROLLWHEEL)
  192. -static void scrollwheel(unsigned short dbop_din)
  193. +static void scrollwheel(unsigned int wheel_value)
  194.  {
  195.      /* current wheel values, parsed from dbop and the resulting button */
  196. -    unsigned        wheel_value     = 0;
  197.      unsigned        btn             = BUTTON_NONE;
  198.      /* old wheel values */
  199.      static unsigned old_wheel_value = 0;
  200. @@ -92,7 +84,7 @@
  201.      /* We only post every 4th action, as this matches better with the physical
  202.       * clicks of the wheel */
  203.      static int counter = 0;
  204. -    /* Read wheel
  205. +    /* Read wheel
  206.       * Bits 13 and 14 of DBOP_DIN change as follows:
  207.       * Clockwise rotation   00 -> 01 -> 11 -> 10 -> 00
  208.       * Counter-clockwise    00 -> 10 -> 11 -> 01 -> 00
  209. @@ -100,7 +92,7 @@
  210.      static const unsigned char wheel_tbl[2][4] =
  211.      {
  212.          { 2, 0, 3, 1 }, /* Clockwise rotation */
  213. -        { 1, 3, 0, 2 }, /* Counter-clockwise  */
  214. +        { 1, 3, 0, 2 }, /* Counter-clockwise  */
  215.      };
  216.  
  217.      if(hold_button)
  218. @@ -109,9 +101,6 @@
  219.          return;
  220.      }
  221.  
  222. -    wheel_value = dbop_din & (1<<13|1<<14);
  223. -    wheel_value >>= 13;
  224. -
  225.      if (old_wheel_value == wheel_tbl[0][wheel_value])
  226.          btn = BUTTON_SCROLL_FWD;
  227.      else if (old_wheel_value == wheel_tbl[1][wheel_value])
  228. @@ -139,7 +128,7 @@
  229.          accel += ACCEL_INCREMENT;
  230.  
  231.          /* the wheel is more reliable if we don't send every change,
  232. -         * every WHEEL_COUNTER_DIVth is basically one "physical click"
  233. +         * every WHEEL_COUNTER_DIVth is basically one "physical click"
  234.           * which should make up 1 item in lists */
  235.          if (++counter >= WHEEL_COUNTER_DIV && queue_empty(&button_queue))
  236.          {
  237. @@ -151,11 +140,7 @@
  238.              last_wheel_post = current_tick;
  239.          }
  240.      }
  241. -    if (accel > 0
  242. -#ifdef SANSA_E200V2
  243. -         && !read_missed /* decrement only if reading buttons was successful */
  244. -#endif         
  245. -        )
  246. +    if (accel > 0)
  247.          accel--;
  248.  
  249.      old_wheel_value = wheel_value;
  250. @@ -167,167 +152,26 @@
  251.      return hold_button;
  252.  }
  253.  
  254. -static void button_delay(void)
  255. -{
  256. -    int i = BUTTON_DELAY;
  257. -    while(i--) asm volatile ("nop\n");
  258. -}
  259. -
  260. -unsigned short button_read_dbop(void)
  261. -{
  262. -#ifdef SANSA_FUZE
  263. -    /* skip home and power reading if lcd_button_support was blocked,
  264. -     * since the dbop bit 15 is invalid then, and use the old value instead
  265. -     * -20 (arbitary value) indicates valid home&power button read
  266. -     * (fuze only) */
  267. -    int old_home_power = -20;
  268. -#endif
  269. -    if(!lcd_button_support())
  270. -    {
  271. -#if defined(SANSA_FUZE)
  272. -        old_home_power = (_dbop_din & (1<<15|1<<8));
  273. -#elif defined(SANSA_E200V2)
  274. -        read_missed = true;
  275. -#endif
  276. -    }
  277. -
  278. -#ifdef SANSA_E200V2
  279. -    if (!read_missed)   /* read buttons only if lcd_button_support was not blocked */
  280. -#endif
  281. -    {
  282. -        /* Set up dbop for input */
  283. -        DBOP_CTRL |= (1<<19);                /* Tri-state DBOP on read cycle */
  284. -        DBOP_CTRL &= ~(1<<16);               /* disable output (1:write enabled) */
  285. -        DBOP_TIMPOL_01 = 0xe167e167;         /* Set Timing & Polarity regs 0 & 1 */
  286. -        DBOP_TIMPOL_23 = 0xe167006e;         /* Set Timing & Polarity regs 2 & 3 */
  287. -
  288. -        button_delay();
  289. -        DBOP_CTRL |= (1<<15);                /* start read */
  290. -        while (!(DBOP_STAT & (1<<16)));      /* wait for valid data */
  291. -
  292. -        _dbop_din = DBOP_DIN;                /* Read dbop data*/
  293. -
  294. -        /* Reset dbop for output */
  295. -        DBOP_TIMPOL_01 = 0x6e167;            /* Set Timing & Polarity regs 0 & 1 */
  296. -        DBOP_TIMPOL_23 = 0xa167e06f;         /* Set Timing & Polarity regs 2 & 3 */
  297. -        DBOP_CTRL |= (1<<16);                /* Enable output (0:write disable)  */
  298. -        DBOP_CTRL &= ~(1<<19);               /* Tri-state when no active write */
  299. -    }
  300. -
  301. -#ifdef SANSA_FUZE
  302. -    /* write back old values if blocked */
  303. -    if (old_home_power != -20)
  304. -    {
  305. -        _dbop_din |= old_home_power & 1<<15;
  306. -        _dbop_din &= 0xfeff|(old_home_power & 1<<8);
  307. -    }
  308. -#endif
  309. -
  310. -#if defined(HAVE_SCROLLWHEEL) && !defined(BOOTLOADER)
  311. -    /* read wheel on bit 13 & 14, but sent to the button queue seperately */
  312. -        scrollwheel(_dbop_din);
  313. -#endif
  314. -
  315. -#ifdef SANSA_E200V2
  316. -    read_missed = false;
  317. -#endif
  318. -
  319. -    return _dbop_din;
  320. -}
  321. -
  322.  /* for the debug menu */
  323.  unsigned short button_dbop_data(void)
  324.  {
  325.      return _dbop_din;
  326.  }
  327.  
  328. -static int button_gpio(void)
  329. -{
  330. -    int btn = BUTTON_NONE;
  331. -    if(hold_button)
  332. -        return btn;
  333. -
  334. -    /* disable DBOP output while changing GPIO pins that share lines with it */
  335. -    DBOP_CTRL &= ~(1<<16);
  336. -    button_delay();
  337. -   
  338. -    /* set afsel, so that we can read our buttons */
  339. -    GPIOC_AFSEL &= ~(1<<2|1<<3|1<<4|1<<5|1<<6);
  340. -    /* set dir so we can read our buttons (but reset the C pins first) */
  341. -    GPIOB_DIR &= ~(1<<4);
  342. -    GPIOC_DIR |= (1<<2|1<<3|1<<4|1<<5|1<<6);
  343. -    GPIOC_PIN(2) = (1<<2);
  344. -    GPIOC_PIN(3) = (1<<3);
  345. -    GPIOC_PIN(4) = (1<<4);
  346. -    GPIOC_PIN(5) = (1<<5);
  347. -    GPIOC_PIN(6) = (1<<6);
  348. -
  349. -    GPIOC_DIR &= ~(1<<2|1<<3|1<<4|1<<5|1<<6);
  350. -
  351. -    /* small delay needed to read buttons correctly */
  352. -    button_delay();
  353. -
  354. -    /* direct GPIO connections */
  355. -    if (!GPIOC_PIN(3))
  356. -        btn |= BUTTON_LEFT;
  357. -    if (!GPIOC_PIN(2))
  358. -        btn |= BUTTON_UP;
  359. -    if (!GPIOC_PIN(6))
  360. -        btn |= BUTTON_DOWN;
  361. -    if (!GPIOC_PIN(5))
  362. -        btn |= BUTTON_RIGHT;
  363. -    if (!GPIOC_PIN(4))
  364. -        btn |= BUTTON_SELECT;
  365. -    /* return to settings needed for lcd */
  366. -    GPIOC_DIR |= (1<<2|1<<3|1<<4|1<<5|1<<6);
  367. -    GPIOC_AFSEL |= (1<<2|1<<3|1<<4|1<<5|1<<6);
  368. -   
  369. -    DBOP_CTRL |= (1<<16);               /* enable output again */
  370. -    return btn;
  371. -}
  372. -
  373.  /*
  374.   * Get button pressed from hardware
  375.   */
  376.  int button_read_device(void)
  377.  {
  378. -    int btn = BUTTON_NONE;
  379. -    unsigned short dbop = button_read_dbop();
  380.  #ifdef SANSA_FUZE
  381.      static unsigned power_counter = 0;
  382.  #endif
  383. -    /* hold button */
  384. -    if(dbop & (1<<12))
  385. -    {
  386. -#ifdef SANSA_FUZE
  387. -        power_counter = HZ;
  388. -#endif
  389. -        hold_button = true;
  390. -    }
  391. -    else
  392. -    {
  393. -        hold_button = false;
  394. -#ifdef SANSA_FUZE
  395. -    /* read power on bit 8, but not if hold button was just released, since
  396. -     * you basically always hit power due to the slider mechanism after releasing
  397. -     * (fuze only)
  398. -     * hold (wait 1 sec) */
  399. -        if (power_counter)
  400. -            power_counter--;
  401. -#endif
  402. -        if (dbop & (1<<8)
  403. -#ifdef SANSA_FUZE
  404. -            && !power_counter
  405. -#endif
  406. -            )
  407. -            btn |= BUTTON_POWER;
  408. -    /* read home on bit 15 */
  409. -        if (!(dbop & (1<<15)))
  410. -            btn |= DBOP_BIT15_BUTTON;
  411. +    int btn = BUTTON_NONE;
  412.  
  413. -        btn |= button_gpio();
  414. -    }
  415. +    _dbop_din = lcd_dbop_input();
  416.  
  417. +    /* hold button handling */
  418. +    hold_button = ((_dbop_din && (1<<12)) == 0);
  419.  #ifndef BOOTLOADER
  420.      /* light handling */
  421.      if (hold_button != hold_button_old)
  422. @@ -336,6 +180,45 @@
  423.          backlight_hold_changed(hold_button);
  424.      }
  425.  #endif /* BOOTLOADER */
  426. +    if (hold_button) {
  427. +#ifdef SANSA_FUZE
  428. +        power_counter = HZ;
  429. +#endif
  430. +        return 0;
  431. +    }
  432.  
  433. +    /* push button handling */
  434. +    if ((_dbop_din & (1 << 2)) == 0)
  435. +        btn |= BUTTON_UP;
  436. +    if ((_dbop_din & (1 << 3)) == 0)
  437. +        btn |= BUTTON_LEFT;
  438. +    if ((_dbop_din & (1 << 4)) == 0)
  439. +        btn |= BUTTON_SELECT;
  440. +    if ((_dbop_din & (1 << 5)) == 0)
  441. +        btn |= BUTTON_RIGHT;
  442. +    if ((_dbop_din & (1 << 6)) == 0)
  443. +        btn |= BUTTON_DOWN;
  444. +    if ((_dbop_din & (1 << 8)) == 0)
  445. +        btn |= BUTTON_POWER;
  446. +    if ((_dbop_din & (1 << 15)) == 0)
  447. +        btn |= DBOP_BIT15_BUTTON;
  448. +
  449. +#ifdef SANSA_FUZE
  450. +        /* read power on bit 8, but not if hold button was just released, since
  451. +         * you basically always hit power due to the slider mechanism after releasing
  452. +         * (fuze only)
  453. +         */
  454. +    if (power_counter > 0) {
  455. +        power_counter--;
  456. +        btn &= ~BUTTON_POWER;
  457. +    }
  458. +#endif
  459. +
  460. +#if defined(HAVE_SCROLLWHEEL) && !defined(BOOTLOADER)
  461. +    /* scroll wheel handling */
  462. +    scrollwheel((_dbop_din >> 13) & 3);
  463. +#endif
  464. +
  465.      return btn;
  466.  }
  467. +

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