Commit graph

19 commits

Author SHA1 Message Date
Cástor Muñoz
00bda90a21 iPod Classic: add non-cached memory region
Configures uncached memory region and adds some defines for misc HW,
for compability with the bootloader and other future use, current
functionality should not be affected.

Change-Id: I390e79bea1aef5b10dfbc72ad327d7fe438ec6f5
2015-12-17 10:52:49 +01:00
Cástor Muñoz
5c67ebbc33 iPod Classic: prepare LCD driver for the bootloader
Optimizes encoding of LCD command sequences.

Change-Id: I9d1eb735e5a972c1a176177ed570a3fe991d7b9f
2015-12-17 09:14:58 +01:00
Cástor Muñoz
f753b8ead1 iPod Classic: s5l8702 clocking rewrite+documentation
This is a rewrite of the clocking section, the resulting system
frequencies are the same as the current git version.

This pàtch uses fixed FClk and just one register is written to switch
all system frequencies, it needs less steps than the current git
version to reach the desired frequency, so it is faster and safer.
Includes functions to step-up/down over a table of predefined set of
frequencies.

The major difference is that Vcore is decreased from 1050 to 1000 mV.

See clocking-s5l8702.h for more information.

Change-Id: I58ac6634e1996adbe1c0c0918a7ce94ad1917d8e
2015-12-17 07:05:53 +01:00
Cástor Muñoz
38ae0d53e8 iPod Classic: implement HAVE_SERIAL
Change-Id: I24a861cd45095d858d1a7db39969f6eda17cc563
2015-10-07 06:15:03 +02:00
Cástor Muñoz
67b4e7f958 iPod Classic: use new PL080 DMA driver
This patch uses the new pl080 DMA driver for I2S playback and LCD
update. I have tried to be as fiel as possible to the current
behaviour, algorithms and configurations are the same, but using
the new driver. Other modifications:

Playback:

 - CHUNK_SIZE is decreased from 42988 to 8188 bytes, it does not
   affect normal playback (block size 1024), was tested using
   metronome (block size 46080). This change is needed because the
   new code commits d-cache range instead of commiting the whole
   d-cache, maximum time spent commiting the range should be
   limited, CHUNK_SIZE can be decreased even more if necessary.

 - pcm_play_dma_start() calls pcm_play_dma_stop() to stop the
   channel when it is running (metronome replays the tick sound
   without stopping the channel).

 - pcm_play_dma_get_peak_buffer(): same as actual SVN function but
   returns samples count instead of bytes count.
   TODO: AFAIK, actually this function is not used in RB. Not tested,
   but probably this function will fail because it returns pointers
   to the internal double buffer.

LCD update:

 - suppresses lcd_wakeup semaphore and uses yield()

Change-Id: I79b8aa47a941e0dd91847150618f3f7f676c26ef
2015-10-07 06:15:03 +02:00
Cástor Muñoz
d6ee2c9eaf iPod Classic: introduce PL080 DMA controller driver
Motivation:

 This driver began as a set of functions to help to test and
 experiment with different DMA configurations. It is cumbersome,
 time consuming, and leads to mistakes to handle LLIs and DMA
 registers dispersed along the code.

 Later, i decided to adapt an old DMA queue driver written in the
 past for a similar (scatter-gather) controller, all task/queue
 code is based on the old driver.

 Finally, some cleaning and dmac_ch_get_info() function was added
 to complete RB needs.

Description:

 - Generic, can be used by other targets including the same
   controller. Not difficult to adapt for other similar
   controllers if necesary.

 - Easy to experiment and compare results using different
   setups and/or queue algorithms:

   Multi-controller and fully configurable from an unique place.

   All task and LLI management is done by the driver, user only
   has to (statically) allocate them.

 - Two queue modes:

   QUEUE_NORMAL: each task in the queue is launched using a new
   DMA transfer once previous task is finished.

   QUEUE_LINK: when a task is queued, it is linked with the last
   queued task, creating a single continuous DMA transfer. New
   tasks must be queued while the channel is running, otherwise
   the continuous DMA transfer will be broken.

   On Classic, QUEUE_LINK mode is needed for I2S continuous
   transfers, QUEUE_NORMAL is used for LCD and could be useful
   in the future for I2C or UART (non-blocking serial debug) if
   necessary.

 - Robust DMA transfer progress info (peak meter), needs final
   testing, see below.

Technical details about DMA progress:

 There are comments in the code related to the method actually
 used (sequence method), it reads progress without halting the
 DMA transfer. Althought the datasheet does not recommend to do
 that, the sequence method seems to be robust, I ran tests calling
 dmac_ch_get_info() millions of times and the results were always
 as expected (tests done at 2:1 CPU/AHB clock ratio, no other
 ratios were tried but probably sequence method will work for any
 typical ratio).

 This controller allows to halt the transfer and drain the DMAC
 FIFO, DMA requests are ignored when the DMA channel is halted.
 This method is not suitable for playback because FIFO is never
 drained to I2S peripheral (who raises the DMA requests). This
 method probably works for capture, the FIFO is drained to memory
 before halting.

 Another way is to disable (stop) the playback channel. When the
 channel is disabled, all FIFO data is lost. It is unknown how much
 the FIFO was filled when it was cleared, SRCADDR counter includes
 the lost data, therefore the only useful information is LINK and
 COUNT, that is the same information disponible when using the
 sequence method. At this point we must procced in the same way as
 in sequence method, in addition the playback channel should be
 relaunched (configure + start) after calculating real SRCADDR.

 The stop+relaunch method should work, it is a bit complicated,
 and not valid for all peripheral FIFO configurations (depending
 on stream rate). Moreover, due to the way the COUNT register is
 implemented in HW, I suspect that this method will fail when
 source and destination bus widths doesn't match. And more
 important, it is not easy to garantize that no sample is lost
 here or there, using the sequence method we can always be sure
 that playback is ok.

Change-Id: Ib12a1e2992e2b6da4fc68431128c793a21b4b540
2015-10-07 06:15:03 +02:00
Cástor Muñoz
609cde9468 iPod Classic: s5l8702 GPIO interrupt controller.
This patch implements a simple API to use the external interrupt
hardware present on s5l8702 (GPIO interrupt controller). This
GPIOIC has been fully tested using emcore apps.

Code is based on openiBoot project, there are a few modifications
to optimize space considering we will only use two or three external
interrupts. The API compiles and works, but has been never used,
therefore probably will need some changes to the final version.

External interrupts are necessary for jack remote+mic controller
(see iAP Interface Specifiction: Headphone Remote and Mic System),
this controller is located at I2C bus address 0x72, there is a IRQ
line for remote button press/release events routed to GPIO E6. At
this moment, the functionallity of this controller has been
extensively tested using emcore, getting a lot of information about
how it works. Microphone is already working on RB, jack accessory
detection and button events are work in progress.

PMU IRQ line is also routed to GPIO F3, it signals many events:
holdswitch, usb plug, wall adapter, low battery... The use of PMU
interrupts is the orthodox way of doing things, at this moment
there is no work done in this direction, there are a lot of PMU
events and i think it is a matter of discursion what to do and how.

Change-Id: Icc2e48965e664ca56c9518d84a81c9d9fdd31736
2015-10-07 06:15:03 +02:00
Cástor Muñoz
57969698ce iPod Classic: update timer API using 32-bit timers.
Change-Id: I49dab8ae955a339ad0a27402fa21caa411c4ecf6
Reviewed-on: http://gerrit.rockbox.org/1032
Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>
2014-11-16 14:18:32 +01:00
Cástor Muñoz
edb0c6c92f iPod Classic: fix s5l8702 cache line length.
Use 32 bytes for cache line length (arm926ej-s), this prevents
misalignments of ATA storage buffer which in some builds could
cause weird faults.

Change-Id: I88dc595d251315620ec49b0251ddc039ff47181e
Reviewed-on: http://gerrit.rockbox.org/1031
Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>
2014-11-13 23:00:33 +01:00
Cástor Muñoz
758a3ae4bb iPod Classic/6G: PCM support for all CS42L55 rates
pcm_dma_apply_settings(): sets the configured PCM frequency,
all native CS42L55 sample rates are available.

Change-Id: I2fcd5581457a669c3044516804cb64fb972218d0
2013-01-09 22:08:28 +01:00
Rafaël Carré
fdcfc8a77c s5l870x: use usb-s3c6400 defines
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31223 a1c6a512-1295-4272-9138-f99709370657
2011-12-13 05:25:57 +00:00
Torne Wuff
569285794b Bulk convert all DOS line endings to UNIX.
For the git migration we want a nice clean repository with UNIX line
endings. git does not use svn:eol-style, we just need the file contents to be
sane.

Sorry everybody. I know this messes up blame.

Scumbag *NIX developer says migrating to git will make line ending issues go
away; commits giant change to svn which changes line endings anyway. :)


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30924 a1c6a512-1295-4272-9138-f99709370657
2011-11-06 22:44:25 +00:00
Michael Sparmann
2ce48832d8 iPod Classic: Set LCD controller configuration register during initialization and don't rely on the bootloader doing that (closes FS#12233)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30908 a1c6a512-1295-4272-9138-f99709370657
2011-11-06 11:35:21 +00:00
Michael Sparmann
06c1757138 iPod Classic: Fix YUV blitting. Mpegplayer works now.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29460 a1c6a512-1295-4272-9138-f99709370657
2011-02-28 11:54:28 +00:00
Michael Sparmann
30fb680a4d iPod Classic CE-ATA Support (Part 4 of 4: S5L8702 ATA driver)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29448 a1c6a512-1295-4272-9138-f99709370657
2011-02-27 22:47:55 +00:00
Michael Sparmann
44870b7415 iPod Classic: Enable boosting by switching the CPU between 1x and 2x AHB clock
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29265 a1c6a512-1295-4272-9138-f99709370657
2011-02-09 21:45:57 +00:00
Michael Sparmann
44f924f8b4 Adjust iPod Classic CPU clock speed constants to at least roughly correct values
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29005 a1c6a512-1295-4272-9138-f99709370657
2011-01-08 01:05:27 +00:00
Michael Sparmann
d5758731bf Fix iPod Classic USEC_TIMER
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28987 a1c6a512-1295-4272-9138-f99709370657
2011-01-07 12:09:54 +00:00
Michael Sparmann
152847977a New port: iPod Classic (also known as iPod 6G/6.5G/7G)
Major known issues:
- No bootloader yet
- No support for the first-generation 160GB CE-ATA hard disk drive yet
- Audio playback is slow, only FLAC seems to reach realtime


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28953 a1c6a512-1295-4272-9138-f99709370657
2011-01-02 23:16:27 +00:00